The number 65501
65501 is a composite number with 4 divisors. Its prime factorisation is 17 × 3853. Divisors (4): 1, 17, 3853, 65501.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 65501: a Harshad number: divisible by its digit sum 17; a semiprime: 17 × 3853, the product of two primes.
- 2
65501 is composite. Its prime factorisation is
- 3
The divisors add up to 69372; without 65501 itself that is 3871, so 65501 is deficient (3871 is less than 65501). Euler's totient φ(65501) = 61632 numbers up to 65501 share no factor with it.
- 4
The digits of 65501 add up to 17, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 130 steps to reach 1.
LaTeX source of the formulas on this page
\[ 65501 = 17 \times 3853 \]
65501 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 69372 |
| Euler totient φ(n) | 61632 |
| Square | 4290381001 |
| Cube | 281024245946501 |
| Square root | 255.931631 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 130 |
| Scientific notation | 6.5501 × |
65501 in other forms
| Form | Value |
|---|---|
| In words | sixty-five thousand five hundred and one |
| Binary (base 2) | 1111111111011101 |
| Octal (base 8) | 177735 |
| Hexadecimal (base 16) | FFDD |
| Base 3 | 10022211222 |
| As time | 65501 seconds = 18 h 11 min 41 s |
Is 65501 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 | No (remainder 1) | 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 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 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 7) | 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 65501 a prime number?
No. 65501 = 17 × 3853, so it is divisible by 17.
What are the factors of 65501?
1, 17, 3853, 65501.
What is 65501 in binary?
1111111111011101 (hexadecimal FFDD, octal 177735).
What is the square root of 65501?
About 255.9316.
Is 65501 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 65501?
65501 is a Harshad number: divisible by its digit sum 17; a semiprime: 17 × 3853, the product of two primes.