Properties of the Number -2581

Five Hundred Eighty-One

Basics

Value: -2582 → -2581 → -2580

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 29 × 89

Divisors: 1, 29, 89, 2581

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101000010101

Octal: -5025

Duodecimal: -15B1

Hexadecimal: -a15

Square: 6661561

Square Root: 50.80354318352215

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

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 107", based on the 5-celled von Neumann neighborhood. A270167

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 229", based on the 5-celled von Neumann neighborhood. A270949

Rhombic matchstick numbers: a(n) = n*(3·n+2). A45944

Powers of cube root of 2 rounded up. A17981

Powers of cube root of 4 rounded up. A17987

a(n) = Fibonacci(n) - 3. Number of total preorders. A6327

Number of integer partitions of n into an odd number of parts, the greatest of which is odd. A340385

Number of set partitions of {1..n} where every block has the same average. A326512

Number of ON states after n generations of cellular automaton rule described by the rulestring B1/S012345678. A151725

Number of (1,0)-steps of weight 1 in all weighted lattice paths in L_n. A182884