31 in Roman Numerals
31
XXXI
thirty-one
How XXXI is formed
| Place | Value | Symbols |
|---|---|---|
| Tens | 30 | XXX |
| Units | 1 | I |
| Total | 31 | XXXI |
XXXI is written one place at a time, from the largest to the smallest: XXX (30) + I (1) = 31.
Where you'll see XXXI
Super Bowl XXXI was played on January 26, 1997 at Louisiana Superdome in New Orleans: the Green Bay Packers beat the New England Patriots 35–21.
The Games of the XXXI Olympiad were held in Rio de Janeiro in 2016.
Using XXXI
As the day of a date, 31 is XXXI: December 31 is XII.XXXI written month.day, or XXXI.XII written day.month. Convert a full date
Numbers near 31
Properties of 31
- Prime factors
- 31
- Divisors
- 1, 31
- Even or odd
- Odd
- Prime number
- Yes
- Letters in XXXI
- 4
31 is a prime number: it can only be divided by 1 and by itself.
31,000 in Roman numerals
With a bar over it (vinculum), X̅X̅X̅I̅ means 31 × 1,000 = 31,000. How Roman numerals work