The number 31273
31273 is a composite number with 4 divisors. Its prime factorisation is 11 × 2843. Divisors (4): 1, 11, 2843, 31273.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 31273: a semiprime: 11 × 2843, the product of two primes.
- 2
31273 is composite. Its prime factorisation is
- 3
The divisors add up to 34128; without 31273 itself that is 2855, so 31273 is deficient (2855 is less than 31273). Euler's totient φ(31273) = 28420 numbers up to 31273 share no factor with it.
- 4
The digits of 31273 add up to 16, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 134 steps to reach 1.
LaTeX source of the formulas on this page
\[ 31273 = 11 \times 2843 \]
31273 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 34128 |
| Euler totient φ(n) | 28420 |
| Square | 978000529 |
| Cube | 30585010543417 |
| Square root | 176.841737 |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 134 |
| Scientific notation | 3.1273 × |
31273 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand two hundred and seventy-three |
| Binary (base 2) | 111101000101001 |
| Octal (base 8) | 75051 |
| Hexadecimal (base 16) | 7A29 |
| Base 3 | 1120220021 |
| As time | 31273 seconds = 8 h 41 min 13 s |
Is 31273 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 1) | 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 1) | 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 7) | 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 | Yes (31273 ÷ 11 = 2843) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 31273 a prime number?
No. 31273 = 11 × 2843, so it is divisible by 11.
What are the factors of 31273?
1, 11, 2843, 31273.
What is 31273 in binary?
111101000101001 (hexadecimal 7A29, octal 75051).
What is the square root of 31273?
About 176.8417.
Is 31273 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 31273?
31273 is a semiprime: 11 × 2843, the product of two primes.