Properties of the Number 81886

Eighty-One Thousand Eight Hundred Eighty-Six

Basics

Value: 81885 → 81886 → 81887

Parity: even

Prime: No

Previous Prime: 81883

Next Prime: 81899

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 2 × 7 × 5849

Divisors: 1, 2, 7, 14, 5849, 11698, 40943, 81886

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111111011110

Octal: 237736

Duodecimal: 3B47A

Hexadecimal: 13fde

Square: 6705316996

Square Root: 286.1572994001726

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

G.f. satisfies: A(x) = 1 + x·A(x)³*A(-x)*A(I·x)*A(-I·x). A214374

Number of lines in Pratt certificate for n-th prime. A37202

Duplicate of A081530. A81886