Properties of the Number 51639

Fifty-One Thousand Six Hundred Thirty-Nine

Basics

Value: 51638 → 51639 → 51640

Parity: odd

Prime: No

Previous Prime: 51637

Next Prime: 51647

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 7 × 2459

Divisors: 1, 3, 7, 21, 2459, 7377, 17213, 51639

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1100100110110111

Octal: 144667

Duodecimal: 25A73

Hexadecimal: c9b7

Square: 2666586321

Square Root: 227.24216158098832

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

Least k such that first k terms of A022300 contain n more 2's than 1's. A25515

Concatenation of 3^k, k = 0,..,n. A51639

Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 4 6 or 7. A252136

Number of (n+2)X(5+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 or 4. A252072

Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 5 6 or 7. A252198

Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 5 6 or 8. A252470

Number of n X 4 0..1 arrays with every element equal to 2, 3, 4 or 5 king-move adjacent elements, with upper left element zero. A297974