The number 31061
31061 is a composite number with 4 divisors. Its prime factorisation is 89 × 349. Divisors (4): 1, 89, 349, 31061.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 31061: a semiprime: 89 × 349, the product of two primes.
- 2
31061 is composite. Its prime factorisation is
- 3
The divisors add up to 31500; without 31061 itself that is 439, so 31061 is deficient (439 is less than 31061). Euler's totient φ(31061) = 30624 numbers up to 31061 share no factor with it.
- 4
The digits of 31061 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 103 steps to reach 1.
LaTeX source of the formulas on this page
\[ 31061 = 89 \times 349 \]
31061 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 31500 |
| Euler totient φ(n) | 30624 |
| Square | 964785721 |
| Cube | 29967209279981 |
| Square root | 176.241312 |
| Digit sum / digital root | 11 / 2 |
| Collatz steps to 1 | 103 |
| Scientific notation | 3.1061 × |
31061 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand and sixty-one |
| Binary (base 2) | 111100101010101 |
| Octal (base 8) | 74525 |
| Hexadecimal (base 16) | 7955 |
| Base 3 | 1120121102 |
| As time | 31061 seconds = 8 h 37 min 41 s |
Is 31061 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 | No (remainder 2) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 1) | 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 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 2) | 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 5) | 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 | No (remainder 1) | 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 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 31061 a prime number?
No. 31061 = 89 × 349, so it is divisible by 89.
What are the factors of 31061?
1, 89, 349, 31061.
What is 31061 in binary?
111100101010101 (hexadecimal 7955, octal 74525).
What is the square root of 31061?
About 176.2413.
Is 31061 divisible by 3?
No. Its digits add up to 11, which is not a multiple of 3.
What is special about the number 31061?
31061 is a semiprime: 89 × 349, the product of two primes.