Properties of the Number 81887

Eighty-One Thousand Eight Hundred Eighty-Seven

Basics

Value: 81886 → 81887 → 81888

Parity: odd

Prime: No

Previous Prime: 81883

Next Prime: 81899

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 13 × 6299

Divisors: 1, 13, 6299, 81887

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111111011111

Octal: 237737

Duodecimal: 3B47B

Hexadecimal: 13fdf

Square: 6705480769

Square Root: 286.1590466855801

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

a(n) = A121678(n)/(n+1) = [xⁿ] (1 + x*(1+x)ⁿ )ⁿ⁺¹ / (n+1). A121679

Numbers k such that lcm(1..k) equals the denominator of the sum of the first k harmonic numbers. A81887