The number 33491
33491 is a composite number with 4 divisors. Its prime factorisation is 107 × 313. Divisors (4): 1, 107, 313, 33491.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 33491: a semiprime: 107 × 313, the product of two primes.
- 2
33491 is composite. Its prime factorisation is
- 3
The divisors add up to 33912; without 33491 itself that is 421, so 33491 is deficient (421 is less than 33491). Euler's totient φ(33491) = 33072 numbers up to 33491 share no factor with it.
- 4
The digits of 33491 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 111 steps to reach 1.
LaTeX source of the formulas on this page
\[ 33491 = 107 \times 313 \]
33491 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 33912 |
| Euler totient φ(n) | 33072 |
| Square | 1121647081 |
| Cube | 37565082389771 |
| Square root | 183.005464 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 111 |
| Scientific notation | 3.3491 × |
33491 in other forms
| Form | Value |
|---|---|
| In words | thirty-three thousand four hundred and ninety-one |
| Binary (base 2) | 1000001011010011 |
| Octal (base 8) | 101323 |
| Hexadecimal (base 16) | 82D3 |
| Base 3 | 1200221102 |
| As time | 33491 seconds = 9 h 18 min 11 s |
Is 33491 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 | No (remainder 3) | 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 7) | 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 33491 a prime number?
No. 33491 = 107 × 313, so it is divisible by 107.
What are the factors of 33491?
1, 107, 313, 33491.
What is 33491 in binary?
1000001011010011 (hexadecimal 82D3, octal 101323).
What is the square root of 33491?
About 183.0055.
Is 33491 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 33491?
33491 is a semiprime: 107 × 313, the product of two primes.