The number 316
316 is a composite number with 6 divisors. Its prime factorisation is × 79. Divisors (6): 1, 2, 4, 79, 158, 316.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
316 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
316 is composite. Its prime factorisation is
- 3
The divisors add up to 560; without 316 itself that is 244, so 316 is deficient (244 is less than 316). Euler's totient φ(316) = 156 numbers up to 316 share no factor with it.
- 4
The digits of 316 add up to 10, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 37 steps to reach 1.
LaTeX source of the formulas on this page
\[ 316 = 2^{2} \times 79 \]316 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 6 |
| Sum of divisors | 560 |
| Euler totient φ(n) | 156 |
| Square | 99856 |
| Cube | 31554496 |
| Square root | 17.776389 (= 2√79) |
| Digit sum / digital root | 10 / 1 |
| Collatz steps to 1 | 37 |
| Scientific notation | 3.16 × |
316 in other forms
| Form | Value |
|---|---|
| In words | three hundred and sixteen |
| Roman numerals | CCCXVI |
| Binary (base 2) | 100111100 |
| Octal (base 8) | 474 |
| Hexadecimal (base 16) | 13C |
| Base 3 | 102201 |
| As time | 316 seconds = 5 min 16 s |
Is 316 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (316 ÷ 2 = 158) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 1) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | Yes (316 ÷ 4 = 79) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 1) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 1) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 4) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 1) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 6) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 8) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 4) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 316 a prime number?
No. 316 = × 79, so it is divisible by 2.
What are the factors of 316?
1, 2, 4, 79, 158, 316.
What is 316 in binary?
100111100 (hexadecimal 13C, octal 474).
What is the square root of 316?
About 17.7764, exactly 2√79.
What is 316 in Roman numerals?
CCCXVI.
Is 316 divisible by 3?
No. Its digits add up to 10, which is not a multiple of 3.
What is special about the number 316?
It is a composite number with 6 divisors.