Properties of the Number 81592

Eighty-One Thousand Five Hundred Ninety-Two

Basics

Value: 81591 → 81592 → 81593

Parity: even

Prime: No

Previous Prime: 81569

Next Prime: 81611

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ³ × 7 × 31 × 47

Divisors: 1, 2, 4, 7, 8, 14, 28, 31, 47, 56

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111010111000

Octal: 237270

Duodecimal: 3B274

Hexadecimal: 13eb8

Square: 6657254464

Square Root: 285.643133997651

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

Number of Motzkin meanders of length n with an even number of humps and without peaks. A325917

A self generating sequence: "there are n a(n)'s in the sequence". Start with 1,2 and use the rule : "a(n)=k implies there are n following k's (k is 1 or 2)". A81592

Number of nX4 0..1 arrays with every element unequal to 0, 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero. A304948