Properties of the Number 21137

Twenty-One Thousand One Hundred Thirty-Seven

Basics

Value: 21136 → 21137 → 21138

Parity: odd

Prime: No

Previous Prime: 21121

Next Prime: 21139

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 23 × 919

Divisors: 1, 23, 919, 21137

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001010010001

Octal: 51221

Duodecimal: 10295

Hexadecimal: 5291

Square: 446772769

Square Root: 145.38569393169328

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 G(n,k) of set partitions of {1,...,n} into sets of size at most k; triangle G(n,k), n>=0, 0<=k<=n, read by rows. A229223

Row sums of triangle A131245. A131246

Replace the word A214317(n) with its position in A007931. A214318

Sum of first n 6-almost primes. A86052

The partition function G(n,7). A229224

Regular triangle read by rows where T(n, k) is the number of set partitions of {1, ..., n} with no block containing k cyclically successive vertices, n >= 1, 2 <= k <= n + 1. A323955

Numbers with d digits (d>0) which have at least 2d distinct primes as substrings. A168167

a(n) = a(n-1) + a(n-2) + 1, with a(0) = 1 and a(1) = 11. A22325

Number of n X 2 binary arrays with an element zero only if there are an even number of ones to its left and an even number of ones above it. A183314

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, -1), (1, -1, 0), (1, 0, 1), (1, 1, -1)}. A148855