Properties of the Number 19218

Nineteen Thousand Two Hundred Eighteen

Basics

Value: 19217 → 19218 → 19219

Parity: even

Prime: No

Previous Prime: 19213

Next Prime: 19219

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 3203

Divisors: 1, 2, 3, 6, 3203, 6406, 9609, 19218

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100101100010010

Octal: 45422

Duodecimal: B156

Hexadecimal: 4b12

Square: 369331524

Square Root: 138.62900129482287

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 T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section. A287030

Number of two-sided n-step prudent walks avoiding two or more consecutive west steps and two or more consecutive south steps. A190589

Sum of squares of cycle lengths for different cycles in Fibonacci-like sequences modulo n. A233246

Number of representations of 0 as a sum of numbers d·k with d in {-1,1} and k in {1,2,...,n}, where the sum of the numbers k is 2n. A236429

Numbers k such that k divides sum of k-th twin prime pair. A335303

Number of inequivalent ways of placing 2 nonattacking rooks on n X n board up to rotations and reflections of the board. A307304

Number of permutations of [n] such that for each cycle c the smallest integer interval containing all elements of c has at most seven elements. A276841

Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite RSN = RUB-17 K4Na12[Zn8Si28O72].18H2O starting with a T4 atom. A19218