Properties of the Number -81172

Eighty-One Thousand One Hundred Seventy-Two

Basics

Value: -81173 → -81172 → -81171

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 7 × 13 × 223

Divisors: 1, 2, 4, 7, 13, 14, 26, 28, 52, 91

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8109 Try Today's Challenge

Representations

Binary: -10011110100010100

Octal: -236424

Duodecimal: -3AB84

Hexadecimal: -13d14

Square: 6588893584

Square Root: 284.9070023709491

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) = ∑_k=0..n-1 9^k*B(k)*binomial(n,k) where B(k) is the k-th Bernoulli number. A83013

Numerator of Bernoulli(n, 1/9). A158807

Sum of divisors of n and product of divisors of n are both perfect cubes. A244428

Let·be the sum of the divisors d_i of k such that d_i | σ(k). Sequence lists the numbers k for which x³ = σ(k). A284284

Number of dyslexic rooted compound windmills with n nodes and leaves of 2 colors where any 2 submills extending from the same node are different. A32236

G.f. = φ⁶, where φ = g.f. for A028930. A328531