Properties of the Number -2157

One Hundred Fifty-Seven

Basics

Value: -2158 → -2157 → -2156

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 719

Divisors: 1, 3, 719, 2157

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100001101101

Octal: -4155

Duodecimal: -12B9

Hexadecimal: -86d

Square: 4652649

Square Root: 46.44351407893249

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. A(x) satisfies A(x) = 1 + 3 * (1 - exp(-x)) * A(1 - exp(-x)). A355094

The sequence of coefficients of cubic polynomials p(x-n), where p(x) = x³ - 3·x + 1. A218332

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 403", based on the 5-celled von Neumann neighborhood. A271810

Coefficients of expansion of:p(t,y)=-Exp[t/4]/(-2 + y·Exp[t/4] + y·Exp[3·t/4]). A171770

Expansion of ∏_k>=1 (1 - (x*(1 + x))^k). A309575

Expansion of ∏_k>=1 1/(1 + x^k)^k-1. A319109

Numbers k such that 8·10^k - 49 is prime. A271269

Crystal ball sequence for hexagonal close-packing. A7202

Coordination sequence for 3D uniform tiling formed by stacking parallel layers of the 3.12.12 2D tiling (cf. A250122). A299257

Number of integer partitions of n such that the parts have the same mean as the multiplicities. A360068