Properties of the Number -261630

Two Hundred Sixty-One Thousand Six Hundred Thirty

Basics

Value: -261631 → -261630 → -261629

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ⁴ × 5 × 17 × 19

Divisors: 1, 2, 3, 5, 6, 9, 10, 15, 17, 18

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -111111110111111110

Octal: -776776

Duodecimal: -1074A6

Hexadecimal: -3fdfe

Square: 68450256900

Square Root: 511.4978005817816

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

Triangle read by rows, coefficients of the polynomials P(m, n) = ∑_k=1..n binomial(m·n, m·k)* P(m, n-k)*z with P(m, 0) = 1 and m = 4. A278074

Number of 3-regular bipartitions of n. A328547

First term of n-th difference sequence of (floor(k·r)), r = sqrt(5), k >= 0. A325668

a(n) = 4ⁿ-2ⁿ-2. A170940

Expansion of (1/x) * Series_Reversion( x*(1+x-x⁴)/(1+x)⁴ ). A366100

Number of Barlow packings with group P6(bar)m2 that repeat after 2n layers. A11949

a(1)=1. For n>1, a(n) equals the smallest number > a(n-1) of the form a(k) U j U a(k) U j, where U represents concatenation (written in decimal) of the binary representation of the arguments, where 1<=k < n, and j = {0} or {1} or {}. A175336

Number of similarity classes of vectors with minimal Ducci period n. A269795

Half of the height of the right trapezoidal gnomon (of the derivative of Y=X⁵). A281999