Properties of the Number 25550

Twenty-Five Thousand Five Hundred Fifty

Basics

Value: 25549 → 25550 → 25551

Parity: even

Prime: No

Previous Prime: 25541

Next Prime: 25561

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 × 5 ² × 7 × 73

Divisors: 1, 2, 5, 7, 10, 14, 25, 35, 50, 70

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110001111001110

Octal: 61716

Duodecimal: 12952

Hexadecimal: 63ce

Square: 652802500

Square Root: 159.84367363145782

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

Powers of cube root of 21 rounded to nearest integer. A18037

Powers of cube root of 21 rounded down. A18036

a(n) is the smallest number k such that the number of divisors of the n numbers from k through k+n-1 are nonincreasing. A75031

Triangle read by rows, T(n,k) = {n,k}*h(k), where {n,k} are the Stirling set numbers and h(k) = hypergeom([-k+1,-k],[],1), for n>=0 and 0<=k<=n. A256549

Numbers k such that k and k² use only the digits 0, 2, 5, 6 and 8. A136913

Numbers k such that Bernoulli number B_k has denominator 4686. A295770

Function of natural numbers satisfying the properties a(2·n) = 2·a(n) and a(2·n+1) = -3 + 2·a(3·n+2). A309154

Expansion of e.g.f. log(1-x)² * (exp(x) - 1) / 2. A381105

Base-8 palindromes that start with 6. A43026

Erroneous version of A075031. A87326