The number 33131
33131 is a composite number with 4 divisors. Its prime factorisation is 7 × 4733. Divisors (4): 1, 7, 4733, 33131.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 33131: a semiprime: 7 × 4733, the product of two primes.
- 2
33131 is composite. Its prime factorisation is
- 3
The divisors add up to 37872; without 33131 itself that is 4741, so 33131 is deficient (4741 is less than 33131). Euler's totient φ(33131) = 28392 numbers up to 33131 share no factor with it.
- 4
The digits of 33131 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 98 steps to reach 1.
LaTeX source of the formulas on this page
\[ 33131 = 7 \times 4733 \]
33131 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 37872 |
| Euler totient φ(n) | 28392 |
| Square | 1097663161 |
| Cube | 36366678187091 |
| Square root | 182.019230 |
| Digit sum / digital root | 11 / 2 |
| Collatz steps to 1 | 98 |
| Scientific notation | 3.3131 × |
33131 in other forms
| Form | Value |
|---|---|
| In words | thirty-three thousand one hundred and thirty-one |
| Binary (base 2) | 1000000101101011 |
| Octal (base 8) | 100553 |
| Hexadecimal (base 16) | 816B |
| Base 3 | 1200110002 |
| As time | 33131 seconds = 9 h 12 min 11 s |
Is 33131 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 1) | 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 | Yes (33131 ÷ 7 = 4733) | 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 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 10) | 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 33131 a prime number?
No. 33131 = 7 × 4733, so it is divisible by 7.
What are the factors of 33131?
1, 7, 4733, 33131.
What is 33131 in binary?
1000000101101011 (hexadecimal 816B, octal 100553).
What is the square root of 33131?
About 182.0192.
Is 33131 divisible by 3?
No. Its digits add up to 11, which is not a multiple of 3.
What is special about the number 33131?
33131 is a semiprime: 7 × 4733, the product of two primes.