Properties of the Number 51621

Fifty-One Thousand Six Hundred Twenty-One

Basics

Value: 51620 → 51621 → 51622

Parity: odd

Prime: No

Previous Prime: 51613

Next Prime: 51631

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 17207

Divisors: 1, 3, 17207, 51621

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 1100100110100101

Octal: 144645

Duodecimal: 25A59

Hexadecimal: c9a5

Square: 2664727641

Square Root: 227.20255280255986

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

Expansion of ∏_{k > 0} (1 + f(k)*x^k), where f(1) = 1 and f(m) = prime(m-1) for m >= 2. A152006

Numbers n such that the last 9 decimal digits of the n-th Fibonacci number is pandigital 1-9. A112371

a(n) = (4·n+9)(!⁴)/9(!⁴), related to A007696(n+1) ((4·n+1)(!⁴) quartic, or 4-factorials). A51621

Number of ways to write n as w + x² + 2·y² + 3·z² + x·y*z, where w is 0 or 1, and x,y,z are nonnegative integers. A352286