The number 31422
31422 is a composite number with 8 divisors. Its prime factorisation is 2 × 3 × 5237. Divisors (8): 1, 2, 3, 6, 5237, 10474, 15711, 31422.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
31422 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
31422 is composite. Its prime factorisation is
- 3
The divisors add up to 62856; without 31422 itself that is 31434, so 31422 is abundant (31434 is more than 31422). Euler's totient φ(31422) = 10472 numbers up to 31422 share no factor with it.
- 4
The digits of 31422 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
\[ 31422 = 2 \times 3 \times 5237 \]
31422 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 62856 |
| Euler totient φ(n) | 10472 |
| Square | 987342084 |
| Cube | 31024262963448 |
| Square root | 177.262517 |
| Digit sum / digital root | 12 / 3 |
| Collatz steps to 1 | 85 |
| Scientific notation | 3.1422 × |
31422 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand four hundred and twenty-two |
| Binary (base 2) | 111101010111110 |
| Octal (base 8) | 75276 |
| Hexadecimal (base 16) | 7ABE |
| Base 3 | 1121002210 |
| As time | 31422 seconds = 8 h 43 min 42 s |
Is 31422 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (31422 ÷ 2 = 15711) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (31422 ÷ 3 = 10474) | 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 | Yes (31422 ÷ 6 = 5237) | 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 6) | 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 2) | 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 6) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 31422 a prime number?
No. 31422 = 2 × 3 × 5237, so it is divisible by 2.
What are the factors of 31422?
1, 2, 3, 6, 5237, 10474, 15711, 31422.
What is 31422 in binary?
111101010111110 (hexadecimal 7ABE, octal 75276).
What is the square root of 31422?
About 177.2625.
Is 31422 divisible by 3?
Yes. Its digits add up to 12, a multiple of 3.
What is special about the number 31422?
It is a composite number with 8 divisors.