Properties of the Number 81333

Eighty-One Thousand Three Hundred Thirty-Three

Basics

Value: 81332 → 81333 → 81334

Parity: odd

Prime: No

Previous Prime: 81331

Next Prime: 81343

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 7 × 1291

Divisors: 1, 3, 7, 9, 21, 63, 1291, 3873, 9037, 11619

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110110110101

Octal: 236665

Duodecimal: 3B099

Hexadecimal: 13db5

Square: 6615056889

Square Root: 285.18941074310595

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

Triangle T(n,k) of k-block tricoverings of an n-set (n >= 3, k >= 4). A60487

Number of 5-block tricoverings of an n-set. A60483

Number of positive integers <= 2ⁿ of form 6·x² + 7·y². A54182

Number of (w,x,y,z) with all terms in {1,...,n} and w>=average{x,y,z}. A212089

Numbers having more than one partition into two 3-smooth numbers. A81333

Number of entries in the ninth cycles of all permutations of [n]. A285237