The number 13511
13511 is a composite number with 4 divisors. Its prime factorisation is 59 × 229. Divisors (4): 1, 59, 229, 13511.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 13511: a semiprime: 59 × 229, the product of two primes.
- 2
13511 is composite. Its prime factorisation is
- 3
The divisors add up to 13800; without 13511 itself that is 289, so 13511 is deficient (289 is less than 13511). Euler's totient φ(13511) = 13224 numbers up to 13511 share no factor with it.
- 4
The digits of 13511 add up to 11, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 76 steps to reach 1.
LaTeX source of the formulas on this page
\[ 13511 = 59 \times 229 \]
13511 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 13800 |
| Euler totient φ(n) | 13224 |
| Square | 182547121 |
| Cube | 2466394151831 |
| Square root | 116.236827 |
| Digit sum / digital root | 11 / 2 |
| Collatz steps to 1 | 76 |
| Scientific notation | 1.3511 × |
13511 in other forms
| Form | Value |
|---|---|
| In words | thirteen thousand five hundred and eleven |
| Binary (base 2) | 11010011000111 |
| Octal (base 8) | 32307 |
| Hexadecimal (base 16) | 34C7 |
| Base 3 | 200112102 |
| As time | 13511 seconds = 3 h 45 min 11 s |
Is 13511 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 | 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 1) | 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 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | 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 3) | 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 13511 a prime number?
No. 13511 = 59 × 229, so it is divisible by 59.
What are the factors of 13511?
1, 59, 229, 13511.
What is 13511 in binary?
11010011000111 (hexadecimal 34C7, octal 32307).
What is the square root of 13511?
About 116.2368.
Is 13511 divisible by 3?
No. Its digits add up to 11, which is not a multiple of 3.
What is special about the number 13511?
13511 is a semiprime: 59 × 229, the product of two primes.