Properties of the Number 81868

Eighty-One Thousand Eight Hundred Sixty-Eight

Basics

Value: 81867 → 81868 → 81869

Parity: even

Prime: No

Previous Prime: 81853

Next Prime: 81869

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 97 × 211

Divisors: 1, 2, 4, 97, 194, 211, 388, 422, 844, 20467

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111111001100

Octal: 237714

Duodecimal: 3B464

Hexadecimal: 13fcc

Square: 6702369424

Square Root: 286.12584643824124

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 parts in all partitions of n in which no part occurs more than four times. A320607

Numbers k such that ∑_j=1..k (binomial(2·j,j) mod 3) is even. A81868

Squares of the form P(n, 5) + n, where P(x,k) is the Pochhammer function and n = square (A000290). A272775