315 in words
315
three hundred fifteen
315 is written three hundred fifteen.
Ways to write it
- As an ordinal
- three hundred fifteenth
- Roman numeral
- CCCXV
- Expanded form
- 300 + 10 + 5
Place value
| Place | Digit | Value |
|---|---|---|
| hundreds | 3 | 300 |
| tens | 1 | 10 |
| ones | 5 | 5 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105 and 315 (12 factors)
- First 10 multiples
- 315, 630, 945, 1,260, 1,575, 1,890, 2,205, 2,520, 2,835, 3,150
- Square
- 315 × 315 = 99,225
- Square root
- ≈ 17.75
- Sum of the digits
- 3 + 1 + 5 = 9
- Rounded to the nearest 10
- 320
- Rounded to the nearest 100
- 300
- Number before
- 314
- Number after
- 316
- In binary
100111011
Quick check
What number comes just after 315?
Show the answer
316
Is 315 even or odd?
Show the answer
Odd
What is 315 + 10?
Show the answer
325
Practice 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 315 in words?
315 is written "three hundred fifteen".
Is 315 a prime number?
No. 315 is a composite number, because it has more than two factors.
What are the factors of 315?
The factors of 315 are 1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105 and 315.
How do you write 315 in Roman numerals?
315 in Roman numerals is CCCXV.