Properties of the Number 81311

Eighty-One Thousand Three Hundred Eleven

Basics

Value: 81310 → 81311 → 81312

Parity: odd

Prime: No

Previous Prime: 81307

Next Prime: 81331

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 17 × 4783

Divisors: 1, 17, 4783, 81311

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110110011111

Octal: 236637

Duodecimal: 3B07B

Hexadecimal: 13d9f

Square: 6611478721

Square Root: 285.150837277396

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

Semiprimes p·q such that p·q+p+q, p·q-(p+q), p·q+2*(p+q) and p·q-2*(p+q) are all primes. A356765

Numbers that can be written as sum of a prime and an 3-smooth number. A81311

Number of nX3 0..3 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor. A203096