The number 47165
47165 is a composite number with 4 divisors. Its prime factorisation is 5 × 9433. Divisors (4): 1, 5, 9433, 47165.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 47165: a semiprime: 5 × 9433, the product of two primes.
- 2
47165 is composite. Its prime factorisation is
- 3
The divisors add up to 56604; without 47165 itself that is 9439, so 47165 is deficient (9439 is less than 47165). Euler's totient φ(47165) = 37728 numbers up to 47165 share no factor with it.
- 4
The digits of 47165 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 83 steps to reach 1.
LaTeX source of the formulas on this page
\[ 47165 = 5 \times 9433 \]
47165 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 56604 |
| Euler totient φ(n) | 37728 |
| Square | 2224537225 |
| Cube | 104920298217125 |
| Square root | 217.175045 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 83 |
| Scientific notation | 4.7165 × |
47165 in other forms
| Form | Value |
|---|---|
| In words | forty-seven thousand one hundred and sixty-five |
| Binary (base 2) | 1011100000111101 |
| Octal (base 8) | 134075 |
| Hexadecimal (base 16) | B83D |
| Base 3 | 2101200212 |
| As time | 47165 seconds = 13 h 6 min 5 s |
Is 47165 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 | Yes (47165 ÷ 5 = 9433) | 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 5) | 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 8) | 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 47165 a prime number?
No. 47165 = 5 × 9433, so it is divisible by 5.
What are the factors of 47165?
1, 5, 9433, 47165.
What is 47165 in binary?
1011100000111101 (hexadecimal B83D, octal 134075).
What is the square root of 47165?
About 217.1750.
Is 47165 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 47165?
47165 is a semiprime: 5 × 9433, the product of two primes.