Properties of the Number 22205

Twenty-Two Thousand Two Hundred Five

Basics

Value: 22204 → 22205 → 22206

Parity: odd

Prime: No

Previous Prime: 22193

Next Prime: 22229

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 5 × 4441

Divisors: 1, 5, 4441, 22205

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101011010111101

Octal: 53275

Duodecimal: 10A25

Hexadecimal: 56bd

Square: 493062025

Square Root: 149.01342221424215

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

Beach-Williams Pell numbers of type k² + 4. A212083

Expansion of e.g.f. tan(x·tan(x/2)) (even powers only). A296839

Fourth row of Pascal-(1,3,1) array A081578. A81586

Numbers n where τ(n) and n-τ(n) are perfect squares, with τ(n) the number of divisors of n (A000005). A245197

a(n) = (4·n³ - 6·n² + 14·n + 3)/3. A321124

n·10³-1, n·10³-3, n·10³-7 and n·10³-9 are all prime. A64977

a(n) = prime(1)² + prime(n)². A287922

Indices of primes in sequence defined by A(0) = 27, A(n) = 10·A(n-1) - 13 for n > 0. A101962

Numbers k = concat(s,t) such that k = (Fibonacci(s) mod k) * (Fibonacci(t) mod k). A272770

Numerator of the limiting density of residues attained by the Fibonacci sequence modulo powers of the n-th prime. A350999