Properties of the Number -2591

Five Hundred Ninety-One

Basics

Value: -2592 → -2591 → -2590

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2591

Divisors: 1, 2591

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101000011111

Octal: -5037

Duodecimal: -15BB

Hexadecimal: -a1f

Square: 6713281

Square Root: 50.90186637049765

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

E.g.f.: r / sqrt(1 + cos(r·x)²) where r = sqrt(2), even powers only. A263248

G.f. satisfies A(x) = 1 + x/(1 + x³) * A(x/(1 + x³)). A360898

Values of n such that L(7) and N(7) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A226927

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 371", based on the 5-celled von Neumann neighborhood. A271457

Elliptic net associated to y² + y = x³ + x² - 2·x, based on the non-torsion generator points P = [0, 0] and Q = [1, 0]. A374833

a(n) = ∑_{d divides n} q(d), where q(d) = A000009 = number of partitions of d into distinct parts. A47966

Primes of the form k² + k + 41. A5846

a(n) = 2·n² - 1. A56220

Numbers n such that (17ⁿ - 2ⁿ)/15 is prime. A225807

Primes with 7 as smallest primitive root. A1126