Properties of the Number 25199

Twenty-Five Thousand One Hundred Ninety-Nine

Basics

Value: 25198 → 25199 → 25200

Parity: odd

Prime: No

Previous Prime: 25189

Next Prime: 25219

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 113 × 223

Divisors: 1, 113, 223, 25199

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110001001101111

Octal: 61157

Duodecimal: 126BB

Hexadecimal: 626f

Square: 634989601

Square Root: 158.741928928686

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) = a(n-1) - 2·a(n-2) with a(0) = 2, a(1) = 1. A2249

Smallest number requiring n terms to be expressed as a sum of factorials. A200748

Numbers n such that σ(φ(n))/σ(n) = 3. A67383

a(n) is the unique odd positive solution y of 2ⁿ = 7x² + y². A77021

Lucas pseudoprimes. A217120

a(n) = 5·n! - 1. A173317

Expansion of (1-4x²)/(1+3x+4x²). A128415

a(1)=1. a(n) = the smallest integer > a(n-1) such that d(a(n))+d(a(n)+1) > d(a(n-1))+d(a(n-1)+1), where d(m) = the number of divisors of m. A175143

Strong Lucas pseudoprimes. A217255

Expansion of (2 + x + x² + x³ - x⁴ - 2·x⁵ - 4·x⁶ - 8·x⁷) / (1 - x⁴ + 16·x⁸) in powers of x. A247487