Properties of the Number 81538

Eighty-One Thousand Five Hundred Thirty-Eight

Basics

Value: 81537 → 81538 → 81539

Parity: even

Prime: No

Previous Prime: 81533

Next Prime: 81547

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 59 × 691

Divisors: 1, 2, 59, 118, 691, 1382, 40769, 81538

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111010000010

Octal: 237202

Duodecimal: 3B22A

Hexadecimal: 13e82

Square: 6648445444

Square Root: 285.5485948135623

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 set partitions of {1..n} where each block has a different average. A326513

a(n) = A081537(n)/A081535(n), with a(2) = 1 by convention. A81538