Properties of the Number 81826

Eighty-One Thousand Eight Hundred Twenty-Six

Basics

Value: 81825 → 81826 → 81827

Parity: even

Prime: No

Previous Prime: 81817

Next Prime: 81839

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 163 × 251

Divisors: 1, 2, 163, 251, 326, 502, 40913, 81826

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111110100010

Octal: 237642

Duodecimal: 3B42A

Hexadecimal: 13fa2

Square: 6695494276

Square Root: 286.0524427443332

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 self-avoiding polygons of length 2n on square lattice (not allowing rotations). A2931

Number of permutations that are 2 "block reversals" away from 12...n. A7972

Number of n X 3 arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..1 n X 3 array. A219286

τ-electron mass ratio. A81826