Properties of the Number 21238

Twenty-One Thousand Two Hundred Thirty-Eight

Basics

Value: 21237 → 21238 → 21239

Parity: even

Prime: No

Previous Prime: 21227

Next Prime: 21247

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 × 7 × 37 × 41

Divisors: 1, 2, 7, 14, 37, 41, 74, 82, 259, 287

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001011110110

Octal: 51366

Duodecimal: 1035A

Hexadecimal: 52f6

Square: 451052644

Square Root: 145.73263189828145

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Numbers k such that Bernoulli number B_k has denominator 498. A282773

-2-Knödel numbers. A225506

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 1 3 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 1 3 6 or 7. A252192

Output of the linear congruential pseudo-random number generator rand() used in Microsoft's Visual C++. A96558

McKay-Thompson series of class 32B for the Monster group. A58630

Consecutive states of the linear congruential pseudo-random number generator 254·s mod (2¹⁶+1) when started at s=1. A384934

Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 1 3 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 1 3 6 or 7. A252185

Number of acyclic ethylene derivatives with n carbon atoms. A5959

Expansion of e.g.f.: tanh(log(1+x)/exp(x)). A9788

Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MFI = ZSM-5 Nan[AlnSi96-nO192] starting with a T4 atom. A19161