The number 31043
31043 is a composite number with 4 divisors. Its prime factorisation is 37 × 839. Divisors (4): 1, 37, 839, 31043.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 31043: a semiprime: 37 × 839, the product of two primes.
- 2
31043 is composite. Its prime factorisation is
- 3
The divisors add up to 31920; without 31043 itself that is 877, so 31043 is deficient (877 is less than 31043). Euler's totient φ(31043) = 30168 numbers up to 31043 share no factor with it.
- 4
The digits of 31043 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 134 steps to reach 1.
LaTeX source of the formulas on this page
\[ 31043 = 37 \times 839 \]
31043 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 31920 |
| Euler totient φ(n) | 30168 |
| Square | 963667849 |
| Cube | 29915141036507 |
| Square root | 176.190238 |
| Digit sum / digital root | 11 / 2 |
| Collatz steps to 1 | 134 |
| Scientific notation | 3.1043 × |
31043 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand and forty-three |
| Binary (base 2) | 111100101000011 |
| Octal (base 8) | 74503 |
| Hexadecimal (base 16) | 7943 |
| Base 3 | 1120120202 |
| As time | 31043 seconds = 8 h 37 min 23 s |
Is 31043 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 5) | 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 2) | 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 | No (remainder 1) | 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 31043 a prime number?
No. 31043 = 37 × 839, so it is divisible by 37.
What are the factors of 31043?
1, 37, 839, 31043.
What is 31043 in binary?
111100101000011 (hexadecimal 7943, octal 74503).
What is the square root of 31043?
About 176.1902.
Is 31043 divisible by 3?
No. Its digits add up to 11, which is not a multiple of 3.
What is special about the number 31043?
31043 is a semiprime: 37 × 839, the product of two primes.