Properties of the Number 51618

Fifty-One Thousand Six Hundred Eighteen

Basics

Value: 51617 → 51618 → 51619

Parity: even

Prime: No

Previous Prime: 51613

Next Prime: 51631

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 7 × 1229

Divisors: 1, 2, 3, 6, 7, 14, 21, 42, 1229, 2458

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1100100110100010

Octal: 144642

Duodecimal: 25A56

Hexadecimal: c9a2

Square: 2664417924

Square Root: 227.1959506681402

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

a(1) = 1 and a(n) = ceiling((∑_k=1..n-1 a(k))/3) for n >= 2. A72493

Poincaré series for invariant polynomial functions on the space of binary forms of degree 11. A293936

Josephus problem: numbers m such that, when m people are arranged on a circle and numbered 1 through m, the final survivor when we remove every 4th person is one of the first three people. A5427

Number of states in minimal automaton that recognizes biquanimous numbers in base n. A65023

Number of ways to place 6 nonattacking grasshoppers on an n·n chessboard. A190579

a(n) = (4·n+6)(!⁴)/6(!⁴). A51618