Properties of the Number 81772

Eighty-One Thousand Seven Hundred Seventy-Two

Basics

Value: 81771 → 81772 → 81773

Parity: even

Prime: No

Previous Prime: 81769

Next Prime: 81773

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 20443

Divisors: 1, 2, 4, 20443, 40886, 81772

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111101101100

Octal: 237554

Duodecimal: 3B3A4

Hexadecimal: 13f6c

Square: 6686659984

Square Root: 285.9580388798329

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) = a(n-1) + a(n-1-(number of odd terms so far)). A7604

Continued fraction for ∑_k>=0 1/4^{2^k-1}. A81772