Properties of the Number -204205

Two Hundred Four Thousand Two Hundred Five

Basics

Value: -204206 → -204205 → -204204

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 5 × 40841

Divisors: 1, 5, 40841, 204205

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110001110110101101

Octal: -616655

Duodecimal: -9A211

Hexadecimal: -31dad

Square: 41699682025

Square Root: 451.8904734556815

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) = (21ⁿ - 1)/20. A218724

Triangle read by rows: 2-Stirling numbers of the second kind. A143494

a(n) = n⁴ + n³ + n² + n + 1. A53699

Triangle of Gaussian binomial coefficients [ n,k ] for q = 21. A22185

Expansion of 1/((1-2x)(1-3x)(1-4x)(1-5x)). A25211

Numbers n for which there are exactly eight k such that n = k + (product of nonzero digits of k). A96929

Triangle read by rows: matrix product of the Stirling numbers of the second kind with the binomial coefficients. A126351

Crystal ball sequence for D₆ lattice. A8358

Main diagonal of square array A108553, in which row n equals the crystal ball sequence for D_n lattice. A108554