Properties of the Number 81632

Eighty-One Thousand Six Hundred Thirty-Two

Basics

Value: 81631 → 81632 → 81633

Parity: even

Prime: No

Previous Prime: 81629

Next Prime: 81637

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ⁵ × 2551

Divisors: 1, 2, 4, 8, 16, 32, 2551, 5102, 10204, 20408

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: 10011111011100000

Octal: 237340

Duodecimal: 3B2A8

Hexadecimal: 13ee0

Square: 6663783424

Square Root: 285.71314285485715

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

Concatenate the terms of A027750 (omitting spaces and commas), chop into blocks of length 5, then omit any leading zeros. A362446

a(n) = ∑_k=0..m (k+1) * A026022(n, k), where m=n for n=0,1 and m = floor((n+3)/2) for n >= 2. A27298

a(n) = 2·3ⁿ-(-1)ⁿ. A81632