The number 16165
16165 is a composite number with 8 divisors. Its prime factorisation is 5 × 53 × 61. Divisors (8): 1, 5, 53, 61, 265, 305, 3233, 16165.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
16165 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
16165 is composite. Its prime factorisation is
- 3
The divisors add up to 20088; without 16165 itself that is 3923, so 16165 is deficient (3923 is less than 16165). Euler's totient φ(16165) = 12480 numbers up to 16165 share no factor with it.
- 4
The digits of 16165 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 146 steps to reach 1.
LaTeX source of the formulas on this page
\[ 16165 = 5 \times 53 \times 61 \]
16165 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 20088 |
| Euler totient φ(n) | 12480 |
| Square | 261307225 |
| Cube | 4224031292125 |
| Square root | 127.141653 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 146 |
| Scientific notation | 1.6165 × |
16165 in other forms
| Form | Value |
|---|---|
| In words | sixteen thousand one hundred and sixty-five |
| Binary (base 2) | 11111100100101 |
| Octal (base 8) | 37445 |
| Hexadecimal (base 16) | 3F25 |
| Base 3 | 211011201 |
| As time | 16165 seconds = 4 h 29 min 25 s |
Is 16165 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 | Yes (16165 ÷ 5 = 3233) | 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 2) | 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 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 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 16165 a prime number?
No. 16165 = 5 × 53 × 61, so it is divisible by 5.
What are the factors of 16165?
1, 5, 53, 61, 265, 305, 3233, 16165.
What is 16165 in binary?
11111100100101 (hexadecimal 3F25, octal 37445).
What is the square root of 16165?
About 127.1417.
Is 16165 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 16165?
It is a composite number with 8 divisors.