Properties of the Number -2491

Four Hundred Ninety-One

Basics

Value: -2492 → -2491 → -2490

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 47 × 53

Divisors: 1, 47, 53, 2491

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: -100110111011

Octal: -4673

Duodecimal: -1537

Hexadecimal: -9bb

Square: 6205081

Square Root: 49.90991885387112

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 g.f. ∏_n>=1 (1-xⁿ)*(1-x^5·n)/(1-x^3·n)². A54274

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 499", based on the 5-celled von Neumann neighborhood. A272563

Triangle read by rows, T(n, k) the coefficients of some polynomials in π, for n >= 0 and 0 <= k <= n. A295517

Number of integer partitions of n with distinct differences between successive parts. A325325

Products of 2 successive primes. A6094

Number of squarefree integers in closed interval [2ⁿ, -1 + 2·2ⁿ], i.e., among 2ⁿ consecutive numbers beginning with 2ⁿ. A77643

Number of partitions of n for which the number of even parts is equal to the positive alternating sum of the parts. A277579

Numerator of 1/9 - 1/n². A61039

Number of squarefree integers not exceeding 2ⁿ. A143658

Convolution of A000203 with itself. A385