Properties of the Number 18225

Eighteen Thousand Two Hundred Twenty-Five

Basics

Value: 18224 → 18225 → 18226

Parity: odd

Prime: No

Previous Prime: 18223

Next Prime: 18229

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ⁶ × 5 ²

Divisors: 1, 3, 5, 9, 15, 25, 27, 45, 75, 81

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 100011100110001

Octal: 43461

Duodecimal: A669

Hexadecimal: 4731

Square: 332150625

Square Root: 135

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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

Least number with exactly n odd divisors. A38547

Numbers of the form 3ⁱ*5^j with i, j >= 0. A3593

Numbers k such that σ(φ(k)) = φ(σ(k)). A33632

Squares of partition numbers. A1255

Perfect powers of nonsquarefree numbers k that are not squareful. A386762

Numbers whose prime factors are 3 and 5. A33849

a(n) = n*(7·n² - 1)/6. A4126

Numbers k such that ∑_j p_j = ∑_j e_j where ∏_j p_j^e_j is the prime factorization of k. A54411

a(n) = (6·n+3)². A16946

List giving least odd integer of each prime signature. A147516