Properties of the Number 81306

Eighty-One Thousand Three Hundred Six

Basics

Value: 81305 → 81306 → 81307

Parity: even

Prime: No

Previous Prime: 81299

Next Prime: 81307

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 4517

Divisors: 1, 2, 3, 6, 9, 18, 4517, 9034, 13551, 27102

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110110011010

Octal: 236632

Duodecimal: 3B076

Hexadecimal: 13d9a

Square: 6610665636

Square Root: 285.14206985290684

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

Numbers k such that 397·2^k+1 is prime. A323043

Numbers n with prime factors less than 2·spf(n), where spf(m) is the smallest prime factor of m (A020639). A81306