The number 55715
55715 is a composite number with 8 divisors. Its prime factorisation is 5 × 11 × 1013. Divisors (8): 1, 5, 11, 55, 1013, 5065, 11143, 55715.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
55715 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55715 is composite. Its prime factorisation is
- 3
The divisors add up to 73008; without 55715 itself that is 17293, so 55715 is deficient (17293 is less than 55715). Euler's totient φ(55715) = 40480 numbers up to 55715 share no factor with it.
- 4
The digits of 55715 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 65 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55715 = 5 \times 11 \times 1013 \]
55715 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 73008 |
| Euler totient φ(n) | 40480 |
| Square | 3104161225 |
| Cube | 172948342650875 |
| Square root | 236.040251 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 65 |
| Scientific notation | 5.5715 × |
55715 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand seven hundred and fifteen |
| Binary (base 2) | 1101100110100011 |
| Octal (base 8) | 154643 |
| Hexadecimal (base 16) | D9A3 |
| Base 3 | 2211102112 |
| As time | 55715 seconds = 15 h 28 min 35 s |
Is 55715 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 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (55715 ÷ 5 = 11143) | 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 3) | 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 | Yes (55715 ÷ 11 = 5065) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55715 a prime number?
No. 55715 = 5 × 11 × 1013, so it is divisible by 5.
What are the factors of 55715?
1, 5, 11, 55, 1013, 5065, 11143, 55715.
What is 55715 in binary?
1101100110100011 (hexadecimal D9A3, octal 154643).
What is the square root of 55715?
About 236.0403.
Is 55715 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 55715?
It is a composite number with 8 divisors.