Properties of the Number -206

Two Hundred Six

Basics

Value: -207 → -206 → -205

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 2 × 103

Divisors: 1, 2, 103, 206

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11001110

Octal: -316

Duodecimal: -152

Hexadecimal: -ce

Square: 42436

Square Root: 14.352700094407323

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

Ooguri-Vafa invariants of disk degeneracies for brane I or brane II in the O(K) -> P² geometry. A61637

a(n) = -n³ + 7·n² - 5·n + 1. A161708

a(n) = -a(n-1) - a(n-2) + a(n-3), a(0)=0, a(1)=0, a(2)=1. A57597

Expansion of k(q) = r(q) * r(q²)² in powers of q where r() is the Rogers-Ramanujan continued fraction. A112274

Sequence is {a(3,n)}, where a(m,n) is defined at sequence A110665. A110668

Expansion of 1 + k(q) = 1 + r(q) * r(q²)² in powers of q where r() is the Rogers-Ramanujan continued fraction. A112803

G.f. satisfies A(x) = (1 + x·A(x)) * (1 - x·A(x)³). A364375

Expansion of φ(x) * ψ(x⁴) * φ(-x⁴)⁴ in powers of·where φ(), ψ() are Ramanujan θ functions. A128711

Triangle read by rows. Let g(n) = n if n is a prime, otherwise g(n) = 1. Let p(0) = 1, p(n) = g(n)*p(n-1). Row n gives coefficients of ∏_j=0..n (x - p(j)), with row 0 = {1}. A118686

Expansion of ψ(x)² * φ(-x²)⁴ in powers of·where φ(), ψ() are Ramanujan θ functions. A228831