Properties of the Number -201643

Two Hundred One Thousand Six Hundred Forty-Three

Basics

Value: -201644 → -201643 → -201642

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 13 × 15511

Divisors: 1, 13, 15511, 201643

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110001001110101011

Octal: -611653

Duodecimal: -98837

Hexadecimal: -313ab

Square: 40659899449

Square Root: 449.0467681656333

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

Construct triangle in which n-th row is obtained by expanding (1 + x + x²)ⁿ and take the next-to-central column. A5717

a(n) equals the coefficient of xⁿ in ∑_m>=0 (x^m + 1 + 1/x^m)^m for n >= 1. A316591

Irregular table read by rows: T(n,k) is the number of k-gons, k>=3, formed inside a right triangle by the straight line segments mutually connecting all vertices and points on the two shorter edges whose positions equal the Farey series of order n. A359971

Number of symmetric, reduced unit interval schemes with n+1 intervals (n>=1). A5213

Irregular triangle read by rows: T(n,m) = number of lattice paths of type A^H terminating at point (n, m). A291081