Properties of the Number -2107

One Hundred Seven

Basics

Value: -2108 → -2107 → -2106

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 7 ² × 43

Divisors: 1, 7, 43, 49, 301, 2107

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100000111011

Octal: -4073

Duodecimal: -1277

Hexadecimal: -83b

Square: 4439449

Square Root: 45.902069670114

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

Expansion of 1/(2 - ∏_k>=1 1/(1 + x^k)). A307060

G.f. A(x) satisfies: A(x) = 1 / (1 - x + x⁴ * A(x)). A349048

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 393", based on the 5-celled von Neumann neighborhood. A271605

Inverse binomial transform of the continued fraction expansion of e. A306810

Hex (or centered hexagonal) numbers: 3·n*(n+1)+1 (crystal ball sequence for hexagonal lattice). A3215

a(n) = n*(n + 6). A28560

Ruth-Aaron numbers (1): sum of prime divisors of n = sum of prime divisors of n+1. A6145

Numerator of 1/9 - 1/n². A61039

Generalized 25-gonal (or icosipentagonal) numbers: m*(23·m - 21)/2 with m = 0, +1, -1, +2, -2, +3, -3, ... A303304

Number of regions that the line segments in A091908(n) cut the equilateral triangle into. A92098