Properties of the Number 81058

Eighty-One Thousand Fifty-Eight

Basics

Value: 81057 → 81058 → 81059

Parity: even

Prime: No

Previous Prime: 81049

Next Prime: 81071

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 40529

Divisors: 1, 2, 40529, 81058

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110010100010

Octal: 236242

Duodecimal: 3AAAA

Hexadecimal: 13ca2

Square: 6570399364

Square Root: 284.70686679460334

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(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = 2^p+1 + 2 - n and p is the unique integer such that 2^p < n - 1 <= 2^p+1, starting with a(1) = 1, a(2) = 3, and a(3) = 2. A49921

a(n) = 2·n³ - 4·n² + 6·n - 2 (n>=1). A304159

Numbers k such that 7·10^k + 79 is prime. A282250

Number of shuffles in Guy's shuffle (see A035485) for the card that is at the top of the deck after n shuffles to come to the top again. A81058