Properties of the Number 15018

Fifteen Thousand Eighteen

Basics

Value: 15017 → 15018 → 15019

Parity: even

Prime: No

Previous Prime: 15017

Next Prime: 15031

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 2503

Divisors: 1, 2, 3, 6, 2503, 5006, 7509, 15018

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11101010101010

Octal: 35252

Duodecimal: 8836

Hexadecimal: 3aaa

Square: 225540324

Square Root: 122.54794979925205

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

Triangle read by rows: T(n,f) is the number of rooted maps with n edges and f faces on an orientable surface of genus 2. A269922

Positive integers m such that π(m²) = π(j²) + π(k²) for no 0 < j <= k < m. A262408

Total number of parts in all partitions of n into odd parts. A67588

Sum of squared factorials: (0!)² + (1!)² + (2!)² + (3!)² +...+ (n!)². A61062

a(n) is the number of rooted maps with n edges and 2 faces on an orientable surface of genus 2. A288082

a(n) = ∑_k=1..n k²*τ(k), where τ is A000005. A319085

Numbers which are the sum of their proper divisors containing the digit 5. A59464

Triangle read by rows: T(n,g) is the number of rooted maps with n edges and 2 faces on an orientable surface of genus g. A270406

Expansion of (1+x-x³)/((1-2·x)*(1-x²)). A52997

Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 14", based on the 5-celled von Neumann neighborhood. A277954