Properties of the Number 81814

Eighty-One Thousand Eight Hundred Fourteen

Basics

Value: 81813 → 81814 → 81815

Parity: even

Prime: No

Previous Prime: 81799

Next Prime: 81817

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 19 × 2153

Divisors: 1, 2, 19, 38, 2153, 4306, 40907, 81814

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111110010110

Octal: 237626

Duodecimal: 3B41A

Hexadecimal: 13f96

Square: 6693530596

Square Root: 286.0314668004204

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

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero. A317565

Number of integer compositions of n containing two adjacent ones and no other runs. A373950

Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero. A317560

Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero. A317563

Deuteron-electron mass ratio. A81814