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Also known as eighty one, eighty-one
natural number
AI overview
81 is a natural number that comes after 80 and before 82. It is notable because it equals 3 to the fourth power (3⁴) and is also a perfect square (9 × 9).
AI-generated from the Wikipedia summary — may contain errors.
Wikidata facts
Show 4 more facts
- code
- 10000
- Commons category
- 81 (number)
- numeric value
- 81
- number of decimal digits
- 2
Sources (1)
via Wikidata · CC0
~2 min read
Article
← 80 81 82 83 84 85 86 87 88 89 → List of numbers Integers
← 0 10 20 30 40 50 60 70 80 90 →
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