The number 31342
31342 is a composite number with 4 divisors. Its prime factorisation is 2 × 15671. Divisors (4): 1, 2, 15671, 31342.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 31342: a semiprime: 2 × 15671, the product of two primes.
- 2
31342 is composite. Its prime factorisation is
- 3
The divisors add up to 47016; without 31342 itself that is 15674, so 31342 is deficient (15674 is less than 31342). Euler's totient φ(31342) = 15670 numbers up to 31342 share no factor with it.
- 4
The digits of 31342 add up to 13, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 59 steps to reach 1.
LaTeX source of the formulas on this page
\[ 31342 = 2 \times 15671 \]
31342 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 47016 |
| Euler totient φ(n) | 15670 |
| Square | 982320964 |
| Cube | 30787903653688 |
| Square root | 177.036719 |
| Digit sum / digital root | 13 / 4 |
| Collatz steps to 1 | 59 |
| Scientific notation | 3.1342 × |
31342 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand three hundred and forty-two |
| Binary (base 2) | 111101001101110 |
| Octal (base 8) | 75156 |
| Hexadecimal (base 16) | 7A6E |
| Base 3 | 1120222211 |
| As time | 31342 seconds = 8 h 42 min 22 s |
Is 31342 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (31342 ÷ 2 = 15671) | 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 | No (remainder 2) | 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 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 3) | 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 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 2) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 3) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 31342 a prime number?
No. 31342 = 2 × 15671, so it is divisible by 2.
What are the factors of 31342?
1, 2, 15671, 31342.
What is 31342 in binary?
111101001101110 (hexadecimal 7A6E, octal 75156).
What is the square root of 31342?
About 177.0367.
Is 31342 divisible by 3?
No. Its digits add up to 13, which is not a multiple of 3.
What is special about the number 31342?
31342 is a semiprime: 2 × 15671, the product of two primes.