Properties of the Number 81568

Eighty-One Thousand Five Hundred Sixty-Eight

Basics

Value: 81567 → 81568 → 81569

Parity: even

Prime: No

Previous Prime: 81563

Next Prime: 81569

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 ⁵ × 2549

Divisors: 1, 2, 4, 8, 16, 32, 2549, 5098, 10196, 20392

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111010100000

Octal: 237240

Duodecimal: 3B254

Hexadecimal: 13ea0

Square: 6653338624

Square Root: 285.60112044598145

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 series-reduced rooted trees whose leaves are non-singleton integer partitions whose multiset union is an integer partition of n. A320295

Number of isosceles right triangles on a 2n X (n+1) grid. A189894

Totients t such that the number of divisors of t equals the number of solutions of φ(x) = t. A305058

The inverse Euler transform of p(n) = n if n is prime, otherwise 1. A358452

Third binomial transform of Fibonacci(n+1). A81568