31 in Roman Numerals
31 written in Roman numeralsXXXI
31 = XXXI. Read left to right: XXX (30) + I (1) = 31.
Going the other way, the Roman numeral XXXI equals the number 31.
How to write 31 in Roman numerals
- Tens: 30 is XXX.
- Ones: 1 is I.
- Put them together, largest first: XXX + I = XXXI.
XXXI uses only additive notation: every symbol is the same size or smaller than the one before it, so you simply add them up.
31 is an odd number, a prime number and written with 4 symbols in Roman numerals.
Where you might see XXXI
- In dates written in Roman numerals, XXXI can stand for day 31 of the month.
- Super Bowl XXXI was the 31st Super Bowl, played in early 1997.
- Book chapters, outlines, movie sequels and royal names use numerals like XXXI for the number 31.
Multiples of XXXI
| Sum | Number | Roman numeral |
|---|---|---|
| 31 × 2 | 62 | LXII |
| 31 × 3 | 93 | XCIII |
| 31 × 5 | 155 | CLV |
| 31 × 10 | 310 | CCCX |
Numerals near XXXI
| Number | Roman numeral |
|---|---|
| 26 | XXVI |
| 27 | XXVII |
| 28 | XXVIII |
| 29 | XXIX |
| 30 | XXX |
| 31 | XXXI |
| 32 | XXXII |
| 33 | XXXIII |
| 34 | XXXIV |
| 35 | XXXV |
| 36 | XXXVI |
Questions
How do you write 31 in Roman numerals?
31 is written XXXI.
What number is XXXI?
XXXI is 31.