Properties of the Number 81885

Eighty-One Thousand Eight Hundred Eighty-Five

Basics

Value: 81884 → 81885 → 81886

Parity: odd

Prime: No

Previous Prime: 81883

Next Prime: 81899

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 53 × 103

Divisors: 1, 3, 5, 15, 53, 103, 159, 265, 309, 515

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10011111111011101

Octal: 237735

Duodecimal: 3B479

Hexadecimal: 13fdd

Square: 6705153225

Square Root: 286.155552104096

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

Numbers n such that A003144(n) = floor(α*n) + 1, where α = 1.839... is the positive real zero of x³-x²-x-1. A275158

Number of active (ON, black) cells at stage 2ⁿ-1 of the two-dimensional cellular automaton defined by "Rule 382", based on the 5-celled von Neumann neighborhood. A271540

Number of steps needed to reach an integer starting with n+1/16 and iterating the map x-->x·ceiling(x). A81885