Properties of the Number -5481

Four Hundred Eighty-One

Basics

Value: -5482 → -5481 → -5480

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 7 × 29

Divisors: 1, 3, 7, 9, 21, 27, 29, 63, 87, 189

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1010101101001

Octal: -12551

Duodecimal: -3209

Hexadecimal: -1569

Square: 30041361

Square Root: 74.03377607551839

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)^k * binomial(n+3·k+3,n-k) * Catalan(k). A360059

Values of n such that L(15) and N(15) 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. A227518

Number of dissections of a polygon: binomial(6n,n)/(5n+1). A2295

Number of reduced words of length n in the Weyl group D₇. A162210

Generalized 28-gonal (or icosioctagonal) numbers: m*(13·m - 12) with m = 0, +1, -1, +2, -2, +3, -3, ... A303812

a(n) = floor(n*(n-1)*(n-2)/4). A11886

Numbers k such that k | 5^k + 1. A15951

Expansion of x⁹/((1-x)*(1-x²)*(1-x³))². A117485

Array read by antidiagonals giving number of paths up and left from (0,0) to (n,kn) where x/y <= k for all intermediate points. A70914

E.g.f. satisfies: A(x) = ∑_n>=0 xⁿ/n! * exp(n·x) * A(x)ⁿ. A273954