The number 5515
5515 is a composite number with 4 divisors. Its prime factorisation is 5 × 1103. Divisors (4): 1, 5, 1103, 5515.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 5515: a semiprime: 5 × 1103, the product of two primes.
- 2
5515 is composite. Its prime factorisation is
- 3
The divisors add up to 6624; without 5515 itself that is 1109, so 5515 is deficient (1109 is less than 5515). Euler's totient φ(5515) = 4408 numbers up to 5515 share no factor with it.
- 4
The digits of 5515 add up to 16, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 160 steps to reach 1.
LaTeX source of the formulas on this page
\[ 5515 = 5 \times 1103 \]
5515 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 6624 |
| Euler totient φ(n) | 4408 |
| Square | 30415225 |
| Cube | 167739965875 |
| Square root | 74.263046 |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 160 |
| Scientific notation | 5.515 × |
5515 in other forms
| Form | Value |
|---|---|
| In words | five thousand five hundred and fifteen |
| Binary (base 2) | 1010110001011 |
| Octal (base 8) | 12613 |
| Hexadecimal (base 16) | 158B |
| Base 3 | 21120021 |
| As time | 5515 seconds = 1 h 31 min 55 s |
Is 5515 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 (5515 ÷ 5 = 1103) | 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 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 7) | 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 4) | 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 5515 a prime number?
No. 5515 = 5 × 1103, so it is divisible by 5.
What are the factors of 5515?
1, 5, 1103, 5515.
What is 5515 in binary?
1010110001011 (hexadecimal 158B, octal 12613).
What is the square root of 5515?
About 74.2630.
Is 5515 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 5515?
5515 is a semiprime: 5 × 1103, the product of two primes.