Properties of the Number 81210

Eighty-One Thousand Two Hundred Ten

Basics

Value: 81209 → 81210 → 81211

Parity: even

Prime: No

Previous Prime: 81203

Next Prime: 81223

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 5 × 2707

Divisors: 1, 2, 3, 5, 6, 10, 15, 30, 2707, 5414

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110100111010

Octal: 236472

Duodecimal: 3ABB6

Hexadecimal: 13d3a

Square: 6595064100

Square Root: 284.97368299546537

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) = 225·n² - 15. A158559

An eighth of the product of three integers surrounding the (n+1)-st prime, minus half of the product of the 3 numbers surrounding n+1. A141535

Number of tilings of 2 X n rectangle with polyominoes, each of which has area = # of adjacent polyominoes. A44043

In prime factorization of n replace each prime power p^e with the greatest squarefree number <= p^e. A81210

Number of nX3 0..2 arrays avoiding the pattern z-2 z-1 z in any row, column or nw-to-se diagonal. A207312