Properties of the Number 18243

Eighteen Thousand Two Hundred Forty-Three

Basics

Value: 18242 → 18243 → 18244

Parity: odd

Prime: No

Previous Prime: 18233

Next Prime: 18251

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 2027

Divisors: 1, 3, 9, 2027, 6081, 18243

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011101000011

Octal: 43503

Duodecimal: A683

Hexadecimal: 4743

Square: 332807049

Square Root: 135.06665021388514

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

Number of digits in the decimal expansion of the number of partitions of 2ⁿ. A129490

Euler transform of A055457. A373296

(1/4) * number of ways to select 3 distinct points forming a triangle of unsigned area = n/2 from a square of grid points with side length n. A320310

a(n) = 225n² + 2n. A158228

Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 15. A31693

a(n) = (prime(n) - 1)*(prime(n+1) - 1)/2 + 3. A201498

a(0) = 1; a(n) = (11·n² - 9·n + 4)/2 for n>0. A389625

Sum of a(n) terms of 1/k^6/7 first exceeds n. A56183

a(n) = ∑_k<=n A007955(k), where A007955(m) = product of divisors of m. A175318

Primes p that have at least four primitive roots that are not primitive roots mod p². A60520