Properties of the Number -18615

Eighteen Thousand Six Hundred Fifteen

Basics

Value: -18616 → -18615 → -18614

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 17 × 73

Divisors: 1, 3, 5, 15, 17, 51, 73, 85, 219, 255

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100100010110111

Octal: -44267

Duodecimal: -A933

Hexadecimal: -48b7

Square: 346518225

Square Root: 136.4367985552285

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

3 times 13-gonal (or tridecagonal) numbers: a(n) = 3·n*(11·n - 9)/2. A153875

Composite squarefree numbers n such that p(i)-9 divides n+9, where p(i) are the prime factors of n. A225709

Zeroless numbers n whose digit product squared is equal to the digit product of n². A256115

a(n) = n*(14·n + 13) + 3. A195029

Number of 5-element subsets of [n] whose sum is a triangular number. A320851

Expansion of 1/(1 - x/(1 - x⁴/(1 - x¹⁰/(1 - x²⁰/(1 - x³⁵/(1 - ... - x^k*(k+1*(k+2)/6)/(1 - ...))))))), a continued fraction. A295072

One eighty-fourth the area of primitive Pythagorean triangles with (increasing) square hypotenuses (precisely those of A008846). A72289

Expansion of f(-q)¹⁰*Q(q) in powers of q. A122269

Odd numbers n such that q(n)² = q(n²) ≠ 0, where q(n) is the digit product on base 10. A278316