31 In Words

Thirty-One

This page can be used as a quick number reference and to learn how to spell and say 31 in its cardinal form and also 31st (ordinal number).

31 in words as a cardinal number is:

Thirty-One

31 in words as an ordinal number (31st) is:

Thirty-First

Number Facts

Odd or Even?
31 is an odd number.
Prime Number?
31 is a prime number.
Natural Number?
31 is a natural number following 30 and preceding 32.