Properties of the Number 81906

Eighty-One Thousand Nine Hundred Six

Basics

Value: 81905 → 81906 → 81907

Parity: even

Prime: No

Previous Prime: 81901

Next Prime: 81919

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 11 × 17 × 73

Divisors: 1, 2, 3, 6, 11, 17, 22, 33, 34, 51

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 10011111111110010

Octal: 237762

Duodecimal: 3B496

Hexadecimal: 13ff2

Square: 6708592836

Square Root: 286.19224308146437

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

a(n) is the number of words of length n over the alphabet {0,1,2} with at least two 1's and exactly one occurrence of the subword 22. A337142

Fourth binomial transform of binomial(n+6, 6). A81906

Number of ways to reciprocally link elements of an nX6 array either to themselves or to exactly one horizontal, diagonal and antidiagonal neighbor. A220619