Properties of the Number 81147

Eighty-One Thousand One Hundred Forty-Seven

Basics

Value: 81146 → 81147 → 81148

Parity: odd

Prime: No

Previous Prime: 81131

Next Prime: 81157

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 11 × 2459

Divisors: 1, 3, 11, 33, 2459, 7377, 27049, 81147

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110011111011

Octal: 236373

Duodecimal: 3AB63

Hexadecimal: 13cfb

Square: 6584835609

Square Root: 284.8631250267398

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

Reversion of partitions into distinct parts A000009. A50393

Number of doubletons in all partitions of n. By a doubleton in a partition we mean an occurrence of a part exactly twice (the partition [4,(3,3),2,2,2,(1,1)] has two doubletons, shown between parentheses). A116646

a(n) = number of distinct words arising in Post's tag system {00, 1101} applied to the word (100)ⁿ , or a(n) = -1 if this word has an unbounded trajectory. A302202

First differences of A022839. A81147

Number of (n+1)X5 0..2 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing. A206219