Properties of the Number 81610

Eighty-One Thousand Six Hundred Ten

Basics

Value: 81609 → 81610 → 81611

Parity: even

Prime: No

Previous Prime: 81569

Next Prime: 81611

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 × 5 × 8161

Divisors: 1, 2, 5, 10, 8161, 16322, 40805, 81610

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10011111011001010

Octal: 237312

Duodecimal: 3B28A

Hexadecimal: 13eca

Square: 6660192100

Square Root: 285.674640106538

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) = ∑_{k=0..floor(n/2)} (k+1) * binomial(2·k,2·n-4·k). A382300

Numbers n such that n² + 1, n² + 3, n² + 7 and n² + 9 are all primes. A57015

Number of numbers <= n having at least one 2 in their ternary representation. A81610