81 (number)
natural number / From Wikipedia, the free encyclopedia
Eighty-one is a number. It comes between eighty and eighty-two, and is an odd number. It is also a square number.
This article is about the number eighty-one. For the year, see 81.
Eighty-one is a number. It comes between eighty and eighty-two, and is an odd number. It is also a square number.