Properties of the Number 81608

Eighty-One Thousand Six Hundred Eight

Basics

Value: 81607 → 81608 → 81609

Parity: even

Prime: No

Previous Prime: 81569

Next Prime: 81611

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ³ × 101 ²

Divisors: 1, 2, 4, 8, 101, 202, 404, 808, 10201, 20402

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111011001000

Octal: 237310

Duodecimal: 3B288

Hexadecimal: 13ec8

Square: 6659865664

Square Root: 285.6711395993652

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 even singletons in all partitions of n (n>=0). A singleton in a partition is a part that occurs exactly once. A276425

Least number k such that k has n anti-divisors. A66464

Number of (n+2) X (1+2) 0..1 arrays with no 3·3 subblock diagonal sum 0 and no antidiagonal sum 3 and no row sum 1 and no column sum 1. A257440

Number of length n arrays of permutations of 0..n-1 with each element moved by -4 to 4 places and with no two consecutive increases or two consecutive decreases. A263662

Members of A143610 for which both neighbors are squarefree. A166987

Number of numbers <= n having no 0 in their ternary representation. A81608