243 in Roman Numerals
243
CCX (subtracted)LIII
two hundred forty-three
How CCXLIII is formed
| Place | Value | Symbols |
|---|---|---|
| Hundreds | 200 | CC |
| Tens | 40 | X (subtracted)L |
| Units | 3 | III |
| Total | 243 | CCXLIII |
CCXLIII is written one place at a time, from the largest to the smallest: CC (200) + XL (40) + III (3) = 243.
XL is the only subtraction: the X before the L takes away 10, so XL = 40.
Common mistakes
Wrong: CCXXXXIII
Why isn't 243 written as CCXXXXIII?
A symbol can't be repeated four times in a row. 40 is XL (50 − 10), not XXXX, so 243 is CCXLIII.
Numbers near 243
Properties of 243
- Prime factors
- 3⁵
- Divisors
- 1, 3, 9, 27, 81, 243
- Even or odd
- Odd
- Prime number
- No
- Letters in CCXLIII
- 7
243,000 in Roman numerals
With a bar over it (vinculum), C̅C̅X̅L̅I̅I̅I̅ means 243 × 1,000 = 243,000. How Roman numerals work