The number 31070
31070 is a composite number with 16 divisors. Its prime factorisation is 2 × 5 × 13 × 239. Divisors (16): 1, 2, 5, 10, 13, 26, 65, 130, 239, 478, 1195, 2390, 3107, 6214, 15535, 31070.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
31070 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
31070 is composite. Its prime factorisation is
- 3
The divisors add up to 60480; without 31070 itself that is 29410, so 31070 is deficient (29410 is less than 31070). Euler's totient φ(31070) = 11424 numbers up to 31070 share no factor with it.
- 4
The digits of 31070 add up to 11, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 116 steps to reach 1.
LaTeX source of the formulas on this page
\[ 31070 = 2 \times 5 \times 13 \times 239 \]
31070 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 60480 |
| Euler totient φ(n) | 11424 |
| Square | 965344900 |
| Cube | 29993266043000 |
| Square root | 176.266843 |
| Digit sum / digital root | 11 / 2 |
| Collatz steps to 1 | 116 |
| Scientific notation | 3.107 × |
31070 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand and seventy |
| Binary (base 2) | 111100101011110 |
| Octal (base 8) | 74536 |
| Hexadecimal (base 16) | 795E |
| Base 3 | 1120121202 |
| As time | 31070 seconds = 8 h 37 min 50 s |
Is 31070 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (31070 ÷ 2 = 15535) | 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 | No (remainder 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (31070 ÷ 5 = 6214) | 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 4) | 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 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (31070 ÷ 10 = 3107) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 31070 a prime number?
No. 31070 = 2 × 5 × 13 × 239, so it is divisible by 2.
What are the factors of 31070?
1, 2, 5, 10, 13, 26, 65, 130, 239, 478, 1195, 2390, 3107, 6214, 15535, 31070.
What is 31070 in binary?
111100101011110 (hexadecimal 795E, octal 74536).
What is the square root of 31070?
About 176.2668.
Is 31070 divisible by 3?
No. Its digits add up to 11, which is not a multiple of 3.
What is special about the number 31070?
It is a composite number with 16 divisors.