Properties of the Number 22809

Twenty-Two Thousand Eight Hundred Nine

Basics

Value: 22808 → 22809 → 22810

Parity: odd

Prime: No

Previous Prime: 22807

Next Prime: 22811

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 7603

Divisors: 1, 3, 7603, 22809

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101100100011001

Octal: 54431

Duodecimal: 11249

Hexadecimal: 5919

Square: 520250481

Square Root: 151.02648774304458

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

Dispersion of (floor(n·e)), by antidiagonals. A191455

Semiprimes q such that q²-4 and q²+4 are also semiprimes. A173084

Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 531", based on the 5-celled von Neumann neighborhood. A282952

a(n) is the number of integers k less than 10ⁿ such that the decimal representation of k lacks the digit 1, at least one of digits 2,3, at least one of digits 4,5, at least one of digits 6,7 and at least one of digits 8,9. A126641

Expansion of e.g.f. exp(3*(exp(x) - 1 - x)). A367890

Number of zero-sum -n..n arrays of 4 elements with first through third differences also in -n..n. A202512

Number of ordered quadruples of integers from [ 2,n ] with no common factors between triples. A15639

Numbers whose base-7 representation contains exactly four 3's. A43408

Number of permutations of length n which avoid the patterns 1342, 3421, 4213. A116802

G.f. A(x) = ∑_n>=0 a(n)*xⁿ satisfies A(x) = 1/(1 - x^a(1) - x^a(2)/(1 - x^a(3) - x^a(4)/(1 - x^a(5) - x^a(6)/(1 - ... )))), a continued fraction. A293855