Properties of the Number -650

Six Hundred Fifty

Basics

Value: -651 → -650 → -649

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 × 5 ² × 13

Divisors: 1, 2, 5, 10, 13, 25, 26, 50, 65, 130

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1010001010

Octal: -1212

Duodecimal: -462

Hexadecimal: -28a

Square: 422500

Square Root: 25.495097567963924

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

a(n) = ∑_{d divides n} (-1)^{d + n/d} * d². A321558

Determinant of rank n matrix of 1..n² filled successively along antidiagonals. A69480

a(n) = A000217(n) - A048702(n). A75113

G.f. A(x,y) = ∑_-oo..+oo (x - yⁿ)ⁿ⁺¹, as a flattened rectangular array of coefficients T(n,k) of xⁿ * y^k*(n+k-1) in A(x,y) for n>=1. A293600

a(2·n) = A000217(n), a(2·n+1) = -2·A000217(n). A131259

a(n) = ∑_k=0..n (-2)^k * |(n - k | k)|, where (a | b) denotes the Kronecker symbol. A367545

Expansion of ∏_k>=1 (1 + k·x)^(1/2^(k+1)). A384343

McKay-Thompson series of class 36f for the Monster group. A112176

Triangle T(n, k) = n! * binomial(n, k)*( ψ(n-k+1) - ψ(k+1) ), read by rows. A157521

Expansion of 1/(1-x/(1+x/(1-x/(1-x/(1+x/(1-x/(1-x/(1+x/(1-... (continued fraction). A168505