Properties of the Number 81850

Eighty-One Thousand Eight Hundred Fifty

Basics

Value: 81849 → 81850 → 81851

Parity: even

Prime: No

Previous Prime: 81847

Next Prime: 81853

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 5 ² × 1637

Divisors: 1, 2, 5, 10, 25, 50, 1637, 3274, 8185, 16370

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10011111110111010

Octal: 237672

Duodecimal: 3B44A

Hexadecimal: 13fba

Square: 6699422500

Square Root: 286.09439001839934

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

Number of odd strict trees of weight n (all outdegrees are odd). A300440

Consider recurrence b(0) = (2n+1)/4, b(n) = b(0)*ceiling(b(n-1)); sequence gives number of steps to reach an integer (or -1 if no integer is ever reached). A81850