The number 31195
31195 is a composite number with 8 divisors. Its prime factorisation is 5 × 17 × 367. Divisors (8): 1, 5, 17, 85, 367, 1835, 6239, 31195.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
31195 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
31195 is composite. Its prime factorisation is
- 3
The divisors add up to 39744; without 31195 itself that is 8549, so 31195 is deficient (8549 is less than 31195). Euler's totient φ(31195) = 23424 numbers up to 31195 share no factor with it.
- 4
The digits of 31195 add up to 19, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 209 steps to reach 1.
LaTeX source of the formulas on this page
\[ 31195 = 5 \times 17 \times 367 \]
31195 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 39744 |
| Euler totient φ(n) | 23424 |
| Square | 973128025 |
| Cube | 30356728739875 |
| Square root | 176.621063 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 209 |
| Scientific notation | 3.1195 × |
31195 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand one hundred and ninety-five |
| Binary (base 2) | 111100111011011 |
| Octal (base 8) | 74733 |
| Hexadecimal (base 16) | 79DB |
| Base 3 | 1120210101 |
| As time | 31195 seconds = 8 h 39 min 55 s |
Is 31195 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 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (31195 ÷ 5 = 6239) | 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 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 1) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 5) | 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 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 31195 a prime number?
No. 31195 = 5 × 17 × 367, so it is divisible by 5.
What are the factors of 31195?
1, 5, 17, 85, 367, 1835, 6239, 31195.
What is 31195 in binary?
111100111011011 (hexadecimal 79DB, octal 74733).
What is the square root of 31195?
About 176.6211.
Is 31195 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 31195?
It is a composite number with 8 divisors.