218421 (number)
218,421 (two hundred eighteen thousand four hundred twentyone) is an odd sixdigits composite number following 218420 and preceding 218422. In scientific notation, it is written as 2.18421 × 10^{5}. The sum of its digits is 18. It has a total of 4 prime factors and 12 positive divisors. There are 124,776 positive integers (up to 218421) that are relatively prime to 218421.
Basic properties
 Is Prime? No
 Number parity Odd
 Number length 6
 Sum of Digits 18
 Digital Root 9
Name
Short name  218 thousand 421 

Full name  two hundred eighteen thousand four hundred twentyone 
Notation
Scientific notation  2.18421 × 10^{5} 

Engineering notation  218.421 × 10^{3} 
Prime Factorization of 218421
Prime Factorization 3^{2} × 7 × 3467
Composite numberω(n)  Distinct Factors  3  Total number of distinct prime factors 

Ω(n)  Total Factors  4  Total number of prime factors 
rad(n)  Radical  72807  Product of the distinct prime numbers 
λ(n)  Liouville Lambda  1  Returns the parity of Ω(n), such that λ(n) = (1)^{Ω(n)} 
μ(n)  Mobius Mu  0  Returns:

Λ(n)  Mangoldt function  0  Returns log(p) if n is a power p^{k} of any prime p (for any k >= 1), else returns 0 
The prime factorization of 218,421 is 3^{2} × 7 × 3467. Since it has a total of 4 prime factors, 218,421 is a composite number.
Divisors of 218421
12 divisors
τ(n)  Total Divisors  12  Total number of the positive divisors of n 

σ(n)  Sum of Divisors  360672  Sum of all the positive divisors of n 
s(n)  Aliquot Sum  142251  Sum of the proper positive divisors of n 
A(n)  Arithmetic Mean  30056  Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n)) 
G(n)  Geometric Mean  467.35532520771  Returns the nth root of the product of n divisors 
H(n)  Harmonic Mean  7.2671346819271  Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors 
The number 218,421 can be divided by 12 positive divisors (out of which 0 are even, and 12 are odd). The sum of these divisors (counting 218,421) is 360,672, the average is 30,056.
Other Arithmetic Functions (n = 218421)
φ(n)  Euler Totient  124776  Total number of positive integers not greater than n that are coprime to n 

λ(n)  Carmichael Lambda  10398  Smallest positive number such that a^{λ(n)} ≡ 1 (mod n) for all a coprime to n 
π(n)  Prime Pi  ≈ 19434  Total number of primes less than or equal to n 
r_{2}(n)  Sum of 2 squares  0  The number of ways n can be represented as the sum of 2 squares 
There are 124,776 positive integers (less than 218,421) that are coprime with 218,421. And there are approximately 19,434 prime numbers less than or equal to 218,421.
Divisibility of 218421
m  2  3  4  5  6  7  8  9 

n mod m  1  0  1  1  3  0  5  0 
The number 218,421 is divisible by 3, 7 and 9.
Classification of 218421
By Arithmetic functions
 Arithmetic
 Deficient
Expressible via specific sums
 Polite
 Nonhypotenuse
Base conversion (218421)
Base  System  Value 

2  Binary  110101010100110101 
3  Ternary  102002121200 
4  Quaternary  311110311 
5  Quinary  23442141 
6  Senary  4403113 
8  Octal  652465 
10  Decimal  218421 
12  Duodecimal  a6499 
16  Hexadecimal  35535 
20  Vigesimal  17611 
36  Base36  4oj9 
Basic calculations (n = 218421)
Multiplication
n×yn×2  436842 

n×3  655263 
n×4  873684 
n×5  1092105 
Division
n÷yn÷2  109210.500 

n÷3  72807.000 
n÷4  54605.250 
n÷5  43684.200 
Exponentiation
n^{y}n^{2}  47707733241 

n^{3}  10420370802232461 
n^{4}  2276027810994416364081 
n^{5}  497132270505211416658936101 
Nth Root
^{y}√n^{2}√n  467.35532520771 

^{3}√n  60.223334331503 
^{4}√n  21.618402466596 
^{5}√n  11.69119429891 
218421 as geometric shapes
Circle
Radius = nDiameter  436842 

Circumference  1372379.6179795 
Area  149878264269.35 
Sphere
Radius = nVolume  4.3648747146633E+16 

Surface area  599513057077.39 
Circumference  1372379.6179795 
Square
Length = nPerimeter  873684 

Area  47707733241 
Diagonal  308893.94050709 
Cube
Length = nSurface area  286246399446 

Volume  10420370802232461 
Space diagonal  378316.26944 
Equilateral Triangle
Length = nPerimeter  655263 

Area  20658054471.839 
Altitude  189158.13472 
Triangular Pyramid
Length = nSurface area  82632217887.355 

Volume  1.2280524761228E+15 
Height  178339.99970281 
Cryptographic Hash Functions
md5  78e146336215c7c872ad62c69d7934a3 

sha1  d7c56ef5f5cd16a1daaa879c3153b434924eb199 
sha256  512dca52e88671eb7336a9e6e5e7cd80d023250380b414c79ee927575f347063 
sha512  5472e860e2ab4bb773d1932f78451424f6968dd381023c4ceeb3e23f9bd6adabcfb80fe7f98f672508b08ffef43898565b171b9cc5b27000c1a291b74a5e04c9 
ripemd160  5ade799863c36c07c8dd81839b870fb9e28a35da 