The number 31373
31373 is a composite number with 4 divisors. Its prime factorisation is 137 × 229. Divisors (4): 1, 137, 229, 31373.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 31373: a semiprime: 137 × 229, the product of two primes.
- 2
31373 is composite. Its prime factorisation is
- 3
The divisors add up to 31740; without 31373 itself that is 367, so 31373 is deficient (367 is less than 31373). Euler's totient φ(31373) = 31008 numbers up to 31373 share no factor with it.
- 4
The digits of 31373 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 54 steps to reach 1.
LaTeX source of the formulas on this page
\[ 31373 = 137 \times 229 \]
31373 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 31740 |
| Euler totient φ(n) | 31008 |
| Square | 984265129 |
| Cube | 30879349892117 |
| Square root | 177.124250 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 54 |
| Scientific notation | 3.1373 × |
31373 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand three hundred and seventy-three |
| Binary (base 2) | 111101010001101 |
| Octal (base 8) | 75215 |
| Hexadecimal (base 16) | 7A8D |
| Base 3 | 1121000222 |
| As time | 31373 seconds = 8 h 42 min 53 s |
Is 31373 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 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 5) | 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 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 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 31373 a prime number?
No. 31373 = 137 × 229, so it is divisible by 137.
What are the factors of 31373?
1, 137, 229, 31373.
What is 31373 in binary?
111101010001101 (hexadecimal 7A8D, octal 75215).
What is the square root of 31373?
About 177.1243.
Is 31373 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 31373?
31373 is a semiprime: 137 × 229, the product of two primes.