Properties of the Number -1631

Six Hundred Thirty-One

Basics

Value: -1632 → -1631 → -1630

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 7 × 233

Divisors: 1, 7, 233, 1631

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -11001011111

Octal: -3137

Duodecimal: -B3B

Hexadecimal: -65f

Square: 2660161

Square Root: 40.38564101261734

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 e.g.f. 1/(1 + (exp(x) - 1)⁴ / 24). A354393

Expansion of ψ(-q)/ψ(-q²) in powers of q where ψ() is a Ramanujan θ function. A116498

Alternating sum of centered octagonal pyramidal numbers. A270695

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 377", based on the 5-celled von Neumann neighborhood. A271464

Expansion of e.g.f. exp(x)^cos(x + sin(x) ). A354545

Numerators of the first column of a table with top row the nonnegative integers and successive rows defined by a reverted Akiyama-Tanigawa procedure. A176599

a(n) = ∑_k=0..n (k+1)! binomial(n,k). A1339

Number of partitions of n into prime power parts (1 included); number of nonisomorphic Abelian subgroups of symmetric group S_n. A23893

Numbers > 1000 such that all the substrings of length = 3 are primes (substrings with leading '0' are considered to be nonprime). A211684

Number of integer partitions of n whose differences (with the last part taken to be 0) are distinct. A325324