Properties of the Number -2521

Five Hundred Twenty-One

Basics

Value: -2522 → -2521 → -2520

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2521

Divisors: 1, 2521

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100111011001

Octal: -4731

Duodecimal: -1561

Hexadecimal: -9d9

Square: 6355441

Square Root: 50.20956084253277

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

G.f.: -(1-3·x²-x³)/(1+4·x-4·x³-x⁴). A97948

Expansion of ∏_k>=1 (1 - x^k/(1 - x)). A307599

a(n) = 2·n³ - 313·n² + 6823·n - 13633. A218456

E.g.f.: ∏_m>=0 exp(-x^4·m+1). A293566

Expansion of ∏_k>=1 (1 - (x/(1+x))^k). A307548

a(n,m) =Floor[N[(-2 + Sqrt[3])ⁿ + (-2 - Sqrt[3])ⁿ]/2^m]. A117809

Triangle T(n,k) read by rows: the coefficient [x^k] of the polynomial ∏_i=1..n (i+1)*x-i in row n>=0 and column 0<=k<=n. A142070

Centered square numbers: a(n) = 2·n*(n+1)+1. Sums of two consecutive squares. Also, consider all Pythagorean triples (X, Y, Z=Y+1) ordered by increasing Z; then sequence gives Z values. A1844

Expansion of ∏_m>=1 (1 + q^m)^m; number of partitions of n into distinct parts, where n different parts of size n are available. A26007

Centered 12-gonal numbers, or centered dodecagonal numbers: numbers of the form 6·k*(k-1) + 1. A3154