Properties of the Number 87210

Eighty-Seven Thousand Two Hundred Ten

Basics

Value: 87209 → 87210 → 87211

Parity: even

Prime: No

Previous Prime: 87187

Next Prime: 87211

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³ × 5 × 17 × 19

Divisors: 1, 2, 3, 5, 6, 9, 10, 15, 17, 18

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10101010010101010

Octal: 252252

Duodecimal: 42576

Hexadecimal: 154aa

Square: 7605584100

Square Root: 295.3133928557931

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 permutations of [n+1] with exactly 1 increasing subsequence of length 3. A3517

Coefficients in a q-analog of the function LambertW(-2·x)/(-2·x), as a triangle read by rows. A152555

Number of 4-ary Lyndon words of length n over GF(4) with trace 0 and subtrace 1. A74447

Sixth convolution of A115140. A115145

Triangle read by rows: T(n,k) is the number of Grand Dyck paths of semilength n that cross downwards the x-axis k times. (A Grand Dyck path of semilength n is a path in the half-plane x>=0, starting at (0,0), ending at (2n,0) and consisting of steps u=(1,1) and d=(1,-1)). A118919

Number of tree-rooted planar maps with 3 faces and n vertices and no isthmuses. A6470

Expansion of e.g.f. exp( ∑_k>=0 x^3·k+5 / (3·k+5)! ). A365897

Triangle T(n,k) read by rows: permutations on 123...n with one abc pattern and no aj pattern with j<=k, n>2, k<n-1. A84249

9th column of Catalan triangle A009766. A124087

Number of ballot sequences of length n having 8 largest parts. A244105