243 in words
243
two hundred and forty-three
243 is written two hundred and forty-three.
Ways to write it
- As an ordinal
- two hundred and forty-third
- Roman numeral
- CCXLIII
- Expanded form
- 200 + 40 + 3
Place value
| Place | Digit | Value |
|---|---|---|
| hundreds | 2 | 200 |
| tens | 4 | 40 |
| ones | 3 | 3 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 3, 9, 27, 81 and 243 (6 factors)
- First 10 multiples
- 243, 486, 729, 972, 1,215, 1,458, 1,701, 1,944, 2,187, 2,430
- Square
- 243 × 243 = 59,049
- Square root
- ≈ 15.59
- Sum of the digits
- 2 + 4 + 3 = 9
- Rounded to the nearest 10
- 240
- Rounded to the nearest 100
- 200
- Number before
- 242
- Number after
- 244
- In binary
11110011
Quick check
What number comes just after 243?
Show the answer
244
Is 243 even or odd?
Show the answer
Odd
What is 243 + 10?
Show the answer
253
Practise with a game
Factors, Multiples & Primes
Multiples, factors, prime numbers, square numbers and prime factors.
Roman Numerals
Read and write Roman numerals from I to 3,999.Frequently asked questions
How do you write 243 in words?
243 is written "two hundred and forty-three".
Is 243 a prime number?
No. 243 is a composite number, because it has more than two factors.
What are the factors of 243?
The factors of 243 are 1, 3, 9, 27, 81 and 243.
How do you write 243 in Roman numerals?
243 in Roman numerals is CCXLIII.