The number 31316
31316 is a composite number with 6 divisors. Its prime factorisation is × 7829. Divisors (6): 1, 2, 4, 7829, 15658, 31316.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
31316 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
31316 is composite. Its prime factorisation is
- 3
The divisors add up to 54810; without 31316 itself that is 23494, so 31316 is deficient (23494 is less than 31316). Euler's totient φ(31316) = 15656 numbers up to 31316 share no factor with it.
- 4
The digits of 31316 add up to 14, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 54 steps to reach 1.
LaTeX source of the formulas on this page
\[ 31316 = 2^{2} \times 7829 \]31316 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 6 |
| Sum of divisors | 54810 |
| Euler totient φ(n) | 15656 |
| Square | 980691856 |
| Cube | 30711346162496 |
| Square root | 176.963273 (= 2√7829) |
| Digit sum / digital root | 14 / 5 |
| Collatz steps to 1 | 54 |
| Scientific notation | 3.1316 × |
31316 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand three hundred and sixteen |
| Binary (base 2) | 111101001010100 |
| Octal (base 8) | 75124 |
| Hexadecimal (base 16) | 7A54 |
| Base 3 | 1120221212 |
| As time | 31316 seconds = 8 h 41 min 56 s |
Is 31316 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (31316 ÷ 2 = 15658) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 2) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | Yes (31316 ÷ 4 = 7829) | 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 2) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 5) | 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 5) | 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 10) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 8) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 31316 a prime number?
No. 31316 = × 7829, so it is divisible by 2.
What are the factors of 31316?
1, 2, 4, 7829, 15658, 31316.
What is 31316 in binary?
111101001010100 (hexadecimal 7A54, octal 75124).
What is the square root of 31316?
About 176.9633, exactly 2√7829.
Is 31316 divisible by 3?
No. Its digits add up to 14, which is not a multiple of 3.
What is special about the number 31316?
It is a composite number with 6 divisors.