Properties of the Number 21822

Twenty-One Thousand Eight Hundred Twenty-Two

Basics

Value: 21821 → 21822 → 21823

Parity: even

Prime: No

Previous Prime: 21821

Next Prime: 21839

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 3637

Divisors: 1, 2, 3, 6, 3637, 7274, 10911, 21822

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101010100111110

Octal: 52476

Duodecimal: 10766

Hexadecimal: 553e

Square: 476199684

Square Root: 147.72271321635003

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 simplicial 3-clusters with n cells. A7173

Numbers n such that 54 'Reverse and Add' steps are needed to reach a palindrome. A65321

Every prefix prime in base 9 (written in base 9). A24769

Consecutive states of the linear congruential pseudo-random number generator 171·s mod 30269 when started at s=1. A385031

Triangle read by rows: number of P-graphs by number of edges and number of non-root nodes. A11268

Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 98. A31596

a(n) = floor(n³ / e). A32636

Numbers k such that (47·10^k + 403)/9 is prime. A285570

Number of transitive relations on an n-set with exactly five ordered pairs. A348634

Decimal expansion of 1/818. A21822