22
22 is the atomic number of titanium, and the number behind the idiom 'Catch-22' — a no-win, paradoxical situation.
- Even
- Composite
Where 22 fits
Why 22 is special
22's cultural fame from Joseph Heller's 1961 novel gives it a media significance entirely disconnected from its ordinary mathematical profile (2 × 11).
Same number, different meanings
How 22 is understood across different contexts — never implying one meaning because of another.
- Mathematics
22's cultural fame from Joseph Heller's 1961 novel gives it a media significance entirely disconnected from its ordinary mathematical profile (2 × 11).
- Science
22 is the atomic number of titanium.
- Media & popular culture
'Catch-22' — the title of Joseph Heller's 1961 novel — has entered everyday English as an idiom for a no-win, paradoxical situation.
22 is part of
Factors & digit properties
- Divisors (4)
- 1, 2, 11, 22
- Prime factorisation
- 2 × 11
- Digit sum
- 4
- Digital root
- 4
Representations
- Decimal
- 22
- Binary
- 10110
- Octal
- 26
- Hexadecimal
- 16
- Roman numeral
- XXII
- Scientific notation
- 2.200 × 10^1
Other mathematical patterns
- Palindromic number
- Deficient number
- Repdigit
- Pentagonal number
- Semiprime
Related numbers & connections
11 is a factor of 22 (11 × 2 = 22).
View 11 →Mathematically related
- has factor11
why?
Strength 0.50, confidence "high".
Science
22 is the atomic number of titanium.
DocumentedScience
Media & popular culture
'Catch-22' — the title of Joseph Heller's 1961 novel — has entered everyday English as an idiom for a no-win, paradoxical situation.
DocumentedMedia & popular culture
Common questions
Is 22 a prime number?
No, 22 is not prime.
What are the factors of 22?
The factors of 22 are 1, 2, 11, 22.
What is 22 in Roman numerals?
22 in Roman numerals is XXII.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026