The number 31163
31163 is a composite number with 4 divisors. Its prime factorisation is 11 × 2833. Divisors (4): 1, 11, 2833, 31163.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 31163: a semiprime: 11 × 2833, the product of two primes.
- 2
31163 is composite. Its prime factorisation is
- 3
The divisors add up to 34008; without 31163 itself that is 2845, so 31163 is deficient (2845 is less than 31163). Euler's totient φ(31163) = 28320 numbers up to 31163 share no factor with it.
- 4
The digits of 31163 add up to 14, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 72 steps to reach 1.
LaTeX source of the formulas on this page
\[ 31163 = 11 \times 2833 \]
31163 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 34008 |
| Euler totient φ(n) | 28320 |
| Square | 971132569 |
| Cube | 30263404247747 |
| Square root | 176.530451 |
| Digit sum / digital root | 14 / 5 |
| Collatz steps to 1 | 72 |
| Scientific notation | 3.1163 × |
31163 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand one hundred and sixty-three |
| Binary (base 2) | 111100110111011 |
| Octal (base 8) | 74673 |
| Hexadecimal (base 16) | 79BB |
| Base 3 | 1120202012 |
| As time | 31163 seconds = 8 h 39 min 23 s |
Is 31163 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 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 3) | 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 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 3) | A number is divisible by 10 if the last digit is 0. |
| 11 | Yes (31163 ÷ 11 = 2833) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 31163 a prime number?
No. 31163 = 11 × 2833, so it is divisible by 11.
What are the factors of 31163?
1, 11, 2833, 31163.
What is 31163 in binary?
111100110111011 (hexadecimal 79BB, octal 74673).
What is the square root of 31163?
About 176.5305.
Is 31163 divisible by 3?
No. Its digits add up to 14, which is not a multiple of 3.
What is special about the number 31163?
31163 is a semiprime: 11 × 2833, the product of two primes.