Properties of the Number 21650

Twenty-One Thousand Six Hundred Fifty

Basics

Value: 21649 → 21650 → 21651

Parity: even

Prime: No

Previous Prime: 21649

Next Prime: 21661

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 × 5 ² × 433

Divisors: 1, 2, 5, 10, 25, 50, 433, 866, 2165, 4330

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101010010010010

Octal: 52222

Duodecimal: 10642

Hexadecimal: 5492

Square: 468722500

Square Root: 147.13938969562162

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 triangular regions into which a figure made up of a row of n adjacent congruent rectangles is divided upon drawing diagonals of all possible rectangles. A324042

Number of even-length compositions of n with alternating parts distinct. A342532

Coordination sequence for root lattice B₃. A22145

a(n) is the number of edges formed by n-secting the angles of a decagon. A335802

Numbers having four 2's in base 8. A43432

Numbers m such that d(1)¹ + d(2)² + ... + d(p)^k = d(1)! + d(2)! + ... + d(k)!, where d(i), i=1..k, are the digits of m. A342945

Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite NES = ν-87 H4[Al4Si64O136].nH2O starting with a T7 atom. A19208

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 1), (-1, 1, 1), (0, -1, 1), (1, 0, 1), (1, 1, -1)}. A149485

Number of n X 7 0..1 arrays with diagonals and antidiagonals unimodal and rows nondecreasing. A223948

Number of (n+1) X (5+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction. A250895