The number 31322
31322 is a composite number with 4 divisors. Its prime factorisation is 2 × 15661. Divisors (4): 1, 2, 15661, 31322.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 31322: a semiprime: 2 × 15661, the product of two primes.
- 2
31322 is composite. Its prime factorisation is
- 3
The divisors add up to 46986; without 31322 itself that is 15664, so 31322 is deficient (15664 is less than 31322). Euler's totient φ(31322) = 15660 numbers up to 31322 share no factor with it.
- 4
The digits of 31322 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
\[ 31322 = 2 \times 15661 \]
31322 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 46986 |
| Euler totient φ(n) | 15660 |
| Square | 981067684 |
| Cube | 30729001998248 |
| Square root | 176.980225 |
| Digit sum / digital root | 11 / 2 |
| Collatz steps to 1 | 103 |
| Scientific notation | 3.1322 × |
31322 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand three hundred and twenty-two |
| Binary (base 2) | 111101001011010 |
| Octal (base 8) | 75132 |
| Hexadecimal (base 16) | 7A5A |
| Base 3 | 1120222002 |
| As time | 31322 seconds = 8 h 42 min 2 s |
Is 31322 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (31322 ÷ 2 = 15661) | 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 | No (remainder 2) | 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 2) | 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 2) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 5) | 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 31322 a prime number?
No. 31322 = 2 × 15661, so it is divisible by 2.
What are the factors of 31322?
1, 2, 15661, 31322.
What is 31322 in binary?
111101001011010 (hexadecimal 7A5A, octal 75132).
What is the square root of 31322?
About 176.9802.
Is 31322 divisible by 3?
No. Its digits add up to 11, which is not a multiple of 3.
What is special about the number 31322?
31322 is a semiprime: 2 × 15661, the product of two primes.