Properties of the Number 22222

Twenty-Two Thousand Two Hundred Twenty-Two

Basics

Value: 22221 → 22222 → 22223

Parity: even

Prime: No

Previous Prime: 22193

Next Prime: 22229

Digit Sum: 10

Digital Root: 1

Palindrome: Yes

Factorization: 2 × 41 × 271

Divisors: 1, 2, 41, 82, 271, 542, 11111, 22222

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101011011001110

Octal: 53316

Duodecimal: 10A3A

Hexadecimal: 56ce

Square: 493817284

Square Root: 149.07045314213008

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

Repdigit numbers, or numbers whose digits are all equal. A10785

a(n) = 2*(10ⁿ - 1)/9. A2276

Start with 1; for n>1, replace n with the concatenation of its prime factors in increasing order. A37276

Kaprekar numbers: positive numbers n such that n = q+r and n² = q·10^m+r, for some m >= 1, q >= 0 and 0 <= r < 10^m, with n ≠ 10^a, a >= 1. A6886

Numbers using only digits 2 and 3. A32810

Expansion of x*(1+x)/((1-x)*(1-10·x²)). A94626

Palindromes in base 3 (written in base 3). A118594

Numbers k such that Bernoulli number B_k has denominator 498. A282773

Numbers whose decimal expansion contains only 0's and 2's. A169965

Numbers in Morse code, with 1 for a dot, 2 for a dash and 0 between digits/letters. A60109