Properties of the Number 81109

Eighty-One Thousand One Hundred Nine

Basics

Value: 81108 → 81109 → 81110

Parity: odd

Prime: No

Previous Prime: 81101

Next Prime: 81119

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 7 × 11587

Divisors: 1, 7, 11587, 81109

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110011010101

Octal: 236325

Duodecimal: 3AB31

Hexadecimal: 13cd5

Square: 6578669881

Square Root: 284.7964185168065

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 lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal, vertical or antidiagonal neighbor, and containing the value n(n+1)/2-2. A211924

Number of length n arrays of permutations of 0..n-1 with each element moved by -4 to 4 places and with no two consecutive increases. A263639

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, -1), (0, 1, 0), (1, 0, 0), (1, 1, 1)}. A151117

9th binomial transform of (1,1,0,0,0,0,0,...). A81109