The number 31107
31107 is a composite number with 4 divisors. Its prime factorisation is 3 × 10369. Divisors (4): 1, 3, 10369, 31107.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 31107: a semiprime: 3 × 10369, the product of two primes.
- 2
31107 is composite. Its prime factorisation is
- 3
The divisors add up to 41480; without 31107 itself that is 10373, so 31107 is deficient (10373 is less than 31107). Euler's totient φ(31107) = 20736 numbers up to 31107 share no factor with it.
- 4
The digits of 31107 add up to 12, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 85 steps to reach 1.
LaTeX source of the formulas on this page
\[ 31107 = 3 \times 10369 \]
31107 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 41480 |
| Euler totient φ(n) | 20736 |
| Square | 967645449 |
| Cube | 30100546982043 |
| Square root | 176.371766 |
| Digit sum / digital root | 12 / 3 |
| Collatz steps to 1 | 85 |
| Scientific notation | 3.1107 × |
31107 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand one hundred and seven |
| Binary (base 2) | 111100110000011 |
| Octal (base 8) | 74603 |
| Hexadecimal (base 16) | 7983 |
| Base 3 | 1120200010 |
| As time | 31107 seconds = 8 h 38 min 27 s |
Is 31107 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (31107 ÷ 3 = 10369) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 2) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 6) | 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 3) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 7) | 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 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 31107 a prime number?
No. 31107 = 3 × 10369, so it is divisible by 3.
What are the factors of 31107?
1, 3, 10369, 31107.
What is 31107 in binary?
111100110000011 (hexadecimal 7983, octal 74603).
What is the square root of 31107?
About 176.3718.
Is 31107 divisible by 3?
Yes. Its digits add up to 12, a multiple of 3.
What is special about the number 31107?
31107 is a semiprime: 3 × 10369, the product of two primes.