Properties of the Number 51397

Fifty-One Thousand Three Hundred Ninety-Seven

Basics

Value: 51396 → 51397 → 51398

Parity: odd

Prime: No

Previous Prime: 51383

Next Prime: 51407

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 103 × 499

Divisors: 1, 103, 499, 51397

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100100011000101

Octal: 144305

Duodecimal: 258B1

Hexadecimal: c8c5

Square: 2641651609

Square Root: 226.70906466217886

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

Triangle defined by g.f. A(x,y) = exp( ∑_n>=1 xⁿ/n * ∑_k=0..n binomial(n·k, k²) * y^k ), as read by rows. A228904

Numbers n such that σ (φ ( n ) ) = σ (σ (n ) ) where φ is Euler's totient and σ is the multiplicative sum-of-divisors function. A65556

Number of 2 X 2 nonsingular 0..n matrices with rows and columns in increasing order. A183762

a(n) = (2·n-2)*(2·n-1)*a(n-1)+1. A51397