The number 13551
13551 is a composite number with 4 divisors. Its prime factorisation is 3 × 4517. Divisors (4): 1, 3, 4517, 13551.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 13551: a semiprime: 3 × 4517, the product of two primes.
- 2
13551 is composite. Its prime factorisation is
- 3
The divisors add up to 18072; without 13551 itself that is 4521, so 13551 is deficient (4521 is less than 13551). Euler's totient φ(13551) = 9032 numbers up to 13551 share no factor with it.
- 4
The digits of 13551 add up to 15, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 244 steps to reach 1.
LaTeX source of the formulas on this page
\[ 13551 = 3 \times 4517 \]
13551 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 18072 |
| Euler totient φ(n) | 9032 |
| Square | 183629601 |
| Cube | 2488364723151 |
| Square root | 116.408763 |
| Digit sum / digital root | 15 / 6 |
| Collatz steps to 1 | 244 |
| Scientific notation | 1.3551 × |
13551 in other forms
| Form | Value |
|---|---|
| In words | thirteen thousand five hundred and fifty-one |
| Binary (base 2) | 11010011101111 |
| Octal (base 8) | 32357 |
| Hexadecimal (base 16) | 34EF |
| Base 3 | 200120220 |
| As time | 13551 seconds = 3 h 45 min 51 s |
Is 13551 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 | Yes (13551 ÷ 3 = 4517) | 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 3) | 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 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 6) | 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 10) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 13551 a prime number?
No. 13551 = 3 × 4517, so it is divisible by 3.
What are the factors of 13551?
1, 3, 4517, 13551.
What is 13551 in binary?
11010011101111 (hexadecimal 34EF, octal 32357).
What is the square root of 13551?
About 116.4088.
Is 13551 divisible by 3?
Yes. Its digits add up to 15, a multiple of 3.
What is special about the number 13551?
13551 is a semiprime: 3 × 4517, the product of two primes.