Properties of the Number 81982

Eighty-One Thousand Nine Hundred Eighty-Two

Basics

Value: 81981 → 81982 → 81983

Parity: even

Prime: No

Previous Prime: 81973

Next Prime: 82003

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 × 179 × 229

Divisors: 1, 2, 179, 229, 358, 458, 40991, 81982

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100000000111110

Octal: 240076

Duodecimal: 3B53A

Hexadecimal: 1403e

Square: 6721048324

Square Root: 286.324990177246

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 3 X n arrays of the minimum value of corresponding elements and their horizontal, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..1 3 X n array. A219520

Primes p such that p+1 is divisible by the digital product (of nonzero digits) of p. A81982

Number of (n+1)X(2+1) 0..4 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 10. A234077