Properties of the Number 81616

Eighty-One Thousand Six Hundred Sixteen

Basics

Value: 81615 → 81616 → 81617

Parity: even

Prime: No

Previous Prime: 81611

Next Prime: 81619

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ⁴ × 5101

Divisors: 1, 2, 4, 8, 16, 5101, 10202, 20404, 40808, 81616

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111011010000

Octal: 237320

Duodecimal: 3B294

Hexadecimal: 13ed0

Square: 6661171456

Square Root: 285.68514137070554

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 words of length n over an alphabet of size 4 that are not "bifix-free". A94559

Sequence of constants appearing in formula for expected number of inversions after a sequence of random adjacent transpositions. A81616

Table read by upward antidiagonals: T(n,k) is the number of strings of length k over an n-letter alphabet that have a bifix; n, k >= 1. A342240