Properties of the Number 51331

Fifty-One Thousand Three Hundred Thirty-One

Basics

Value: 51330 → 51331 → 51332

Parity: odd

Prime: No

Previous Prime: 51329

Next Prime: 51341

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 7 × 7333

Divisors: 1, 7, 7333, 51331

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100100010000011

Octal: 144203

Duodecimal: 25857

Hexadecimal: c883

Square: 2634871561

Square Root: 226.563456894531

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

Sum of the 4th powers of the divisor complements of the odd proper divisors of n. A352050

Numerator of ∑_k=1..n 1/(2k-1)⁴. A120269

a(n) = ((2n-1)!!)⁴ * ∑_i=1..n 1/(2·i-1)⁴. A291586

Square array T(n,k), n>=0, k>=0, read by antidiagonals: T(n,k) = ((2n-1)!!)^k * ∑_i=1..n 1/(2·i-1)^k. A291656

Number of -n..n arrays of 4 elements with first and second differences also in -n..n. A201089

Euclid-Mullin sequence (A000945) with initial value a(1)=131071 instead of a(1)=2. A51331