The number 13318
13318 is a composite number with 4 divisors. Its prime factorisation is 2 × 6659. Divisors (4): 1, 2, 6659, 13318.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 13318: a semiprime: 2 × 6659, the product of two primes.
- 2
13318 is composite. Its prime factorisation is
- 3
The divisors add up to 19980; without 13318 itself that is 6662, so 13318 is deficient (6662 is less than 13318). Euler's totient φ(13318) = 6658 numbers up to 13318 share no factor with it.
- 4
The digits of 13318 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 94 steps to reach 1.
LaTeX source of the formulas on this page
\[ 13318 = 2 \times 6659 \]
13318 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 19980 |
| Euler totient φ(n) | 6658 |
| Square | 177369124 |
| Cube | 2362201993432 |
| Square root | 115.403639 |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 94 |
| Scientific notation | 1.3318 × |
13318 in other forms
| Form | Value |
|---|---|
| In words | thirteen thousand three hundred and eighteen |
| Binary (base 2) | 11010000000110 |
| Octal (base 8) | 32006 |
| Hexadecimal (base 16) | 3406 |
| Base 3 | 200021021 |
| As time | 13318 seconds = 3 h 41 min 58 s |
Is 13318 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (13318 ÷ 2 = 6659) | 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 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 3) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 4) | 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 6) | 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 8) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 8) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 13318 a prime number?
No. 13318 = 2 × 6659, so it is divisible by 2.
What are the factors of 13318?
1, 2, 6659, 13318.
What is 13318 in binary?
11010000000110 (hexadecimal 3406, octal 32006).
What is the square root of 13318?
About 115.4036.
Is 13318 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 13318?
13318 is a semiprime: 2 × 6659, the product of two primes.