Properties of the Number 81392

Eighty-One Thousand Three Hundred Ninety-Two

Basics

Value: 81391 → 81392 → 81393

Parity: even

Prime: No

Previous Prime: 81373

Next Prime: 81401

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ⁴ × 5087

Divisors: 1, 2, 4, 8, 16, 5087, 10174, 20348, 40696, 81392

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110111110000

Octal: 236760

Duodecimal: 3B128

Hexadecimal: 13df0

Square: 6624657664

Square Root: 285.29283201650895

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 polyhexes with n cells that tile the plane by translation or by 180-degree rotation (Conway criterion). A75212

Number of idempotent 3 X 3 -n..n matrices. A223455

Number of (n+5) X 10 0..1 matrices with each 6 X 6 subblock idempotent. A224574

Numbers whose base-5 representation has exactly 8 runs. A43608

Numbers k such that the central binomial coefficient C(k, floor(k/2)) has only one prime divisor whose exponent is greater than one. A81392