The number 17155
17155 is a composite number with 8 divisors. Its prime factorisation is 5 × 47 × 73. Divisors (8): 1, 5, 47, 73, 235, 365, 3431, 17155.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
17155 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
17155 is composite. Its prime factorisation is
- 3
The divisors add up to 21312; without 17155 itself that is 4157, so 17155 is deficient (4157 is less than 17155). Euler's totient φ(17155) = 13248 numbers up to 17155 share no factor with it.
- 4
The digits of 17155 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 66 steps to reach 1.
LaTeX source of the formulas on this page
\[ 17155 = 5 \times 47 \times 73 \]
17155 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 21312 |
| Euler totient φ(n) | 13248 |
| Square | 294294025 |
| Cube | 5048613998875 |
| Square root | 130.977097 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 66 |
| Scientific notation | 1.7155 × |
17155 in other forms
| Form | Value |
|---|---|
| In words | seventeen thousand one hundred and fifty-five |
| Binary (base 2) | 100001100000011 |
| Octal (base 8) | 41403 |
| Hexadecimal (base 16) | 4303 |
| Base 3 | 212112101 |
| As time | 17155 seconds = 4 h 45 min 55 s |
Is 17155 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 (17155 ÷ 5 = 3431) | 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 5) | 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 6) | 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 17155 a prime number?
No. 17155 = 5 × 47 × 73, so it is divisible by 5.
What are the factors of 17155?
1, 5, 47, 73, 235, 365, 3431, 17155.
What is 17155 in binary?
100001100000011 (hexadecimal 4303, octal 41403).
What is the square root of 17155?
About 130.9771.
Is 17155 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 17155?
It is a composite number with 8 divisors.