Properties of the Number 81167

Eighty-One Thousand One Hundred Sixty-Seven

Basics

Value: 81166 → 81167 → 81168

Parity: odd

Prime: No

Previous Prime: 81163

Next Prime: 81173

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 23 × 3529

Divisors: 1, 23, 3529, 81167

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10011110100001111

Octal: 236417

Duodecimal: 3AB7B

Hexadecimal: 13d0f

Square: 6588081889

Square Root: 284.8982274427133

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(0)=1; for n >= 1, a(n) is the number of subsets of [a(0), a(1), ..., a(n-1)] whose sum is equal to a(n-1). A265853

a(n) = (1/2)*s(n+3), where s = A025248. A25249

a(n) cannot be prefixed or followed by any digit to form a prime ('empty' prefixes allowed). A32736

Expansion of (1 - x - sqrt(1 - 2·x + x² - 8·x³)) / (4·x²) in powers of x. A91565

Number of cycles in range [A014137(2n)..A014138(2n)] of permutation A057505/A057506. A81167