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Properties of the Number 21933

Twenty-One Thousand Nine Hundred Thirty-Three

Basics

Value: 21932 → 21933 → 21934

Parity: odd

Prime: No

Previous Prime: 21929

Next Prime: 21937

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 2 × 2437

Divisors: 1, 3, 9, 2437, 7311, 21933

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101010110101101

Octal: 52655

Duodecimal: 10839

Hexadecimal: 55ad

Square: 481056489

Square Root: 148.0979405663698

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

T(n,k)=Number of nXk 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value 2-x(i,j). A230675
Triangle read by rows giving numbers of paths in a lattice satisfying certain conditions. A71944
Constant term of the reduction by x2->x+2 of the polynomial p(n,x)=1+xn+x2n. A192465
a(n) is the n-th diagonal sum of left justified array T given by A027960. A27975
Number of nX6 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value 2-x(i,j). A230673
Number of 2 X n 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value 2-x(i,j). A230676
The number of maximal subsemigroups of the Jones monoid on the set [1..n]. A290140
Triangle in A071944 with rows reversed. A108074
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, 0), (-1, 0, -1), (1, -1, -1), (1, 1, 1)}. A149497
Number of nonnegative integers with property that their base 9/5 expansion (see A024653) has n digits. A245430