Properties of the Number 81115

Eighty-One Thousand One Hundred Fifteen

Basics

Value: 81114 → 81115 → 81116

Parity: odd

Prime: No

Previous Prime: 81101

Next Prime: 81119

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 5 × 16223

Divisors: 1, 5, 16223, 81115

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110011011011

Octal: 236333

Duodecimal: 3AB37

Hexadecimal: 13cdb

Square: 6579643225

Square Root: 284.8069521623375

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

Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 421", based on the 5-celled von Neumann neighborhood. A282075

Numbers m for which the sum of all values of k satisfying the equation: (m - floor((m - k)/k)) mod k = 0 (1 <= k <= m) equals 2·m. A380153

(p² - 1)/12 where p > 3 runs through the primes. A81115

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