The number 31049
31049 is a composite number with 4 divisors. Its prime factorisation is 61 × 509. Divisors (4): 1, 61, 509, 31049.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 31049: a semiprime: 61 × 509, the product of two primes.
- 2
31049 is composite. Its prime factorisation is
- 3
The divisors add up to 31620; without 31049 itself that is 571, so 31049 is deficient (571 is less than 31049). Euler's totient φ(31049) = 30480 numbers up to 31049 share no factor with it.
- 4
The digits of 31049 add up to 17, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 59 steps to reach 1.
LaTeX source of the formulas on this page
\[ 31049 = 61 \times 509 \]
31049 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 31620 |
| Euler totient φ(n) | 30480 |
| Square | 964040401 |
| Cube | 29932490410649 |
| Square root | 176.207264 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 59 |
| Scientific notation | 3.1049 × |
31049 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand and forty-nine |
| Binary (base 2) | 111100101001001 |
| Octal (base 8) | 74511 |
| Hexadecimal (base 16) | 7949 |
| Base 3 | 1120120222 |
| As time | 31049 seconds = 8 h 37 min 29 s |
Is 31049 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 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 4) | 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 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 9) | 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 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 31049 a prime number?
No. 31049 = 61 × 509, so it is divisible by 61.
What are the factors of 31049?
1, 61, 509, 31049.
What is 31049 in binary?
111100101001001 (hexadecimal 7949, octal 74511).
What is the square root of 31049?
About 176.2073.
Is 31049 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 31049?
31049 is a semiprime: 61 × 509, the product of two primes.