Twenty-two (22) is a positive integer one more than 21 and one less than 23.</p>

## Properties

- 22 is a composite number, factoring into 2*11.
- 22 is a palindrone; switching the digits makes no change to its value.
- 22 is known as a repdigit because it is made exclusively of 2's.

## In googology

Using this definition, dumevalka can be calculated as 2[2,2] = 22 = 2[2] = 22. Dutridumevalka and duquodumevalka are also equal to 22 because for any b, 2[b,2] = 2[[[..2..]]] (b brackets) = 2[[..2..]] (b-1 brackets) = 2[b-1,2], so 2[4,2] = 2[3,2] = 2[2,2] = 22. This is another example of degenerate cases in googological functions, seen with inputs of 2.

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