The number 13443
13443 is a composite number with 4 divisors. Its prime factorisation is 3 × 4481. Divisors (4): 1, 3, 4481, 13443.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 13443: a semiprime: 3 × 4481, the product of two primes.
- 2
13443 is composite. Its prime factorisation is
- 3
The divisors add up to 17928; without 13443 itself that is 4485, so 13443 is deficient (4485 is less than 13443). Euler's totient φ(13443) = 8960 numbers up to 13443 share no factor with it.
- 4
The digits of 13443 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 45 steps to reach 1.
LaTeX source of the formulas on this page
\[ 13443 = 3 \times 4481 \]
13443 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 17928 |
| Euler totient φ(n) | 8960 |
| Square | 180714249 |
| Cube | 2429341649307 |
| Square root | 115.943952 |
| Digit sum / digital root | 15 / 6 |
| Collatz steps to 1 | 45 |
| Scientific notation | 1.3443 × |
13443 in other forms
| Form | Value |
|---|---|
| In words | thirteen thousand four hundred and forty-three |
| Binary (base 2) | 11010010000011 |
| Octal (base 8) | 32203 |
| Hexadecimal (base 16) | 3483 |
| Base 3 | 200102220 |
| As time | 13443 seconds = 3 h 44 min 3 s |
Is 13443 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 (13443 ÷ 3 = 4481) | 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 3) | 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 3) | 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 6) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 3) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 1) | 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 13443 a prime number?
No. 13443 = 3 × 4481, so it is divisible by 3.
What are the factors of 13443?
1, 3, 4481, 13443.
What is 13443 in binary?
11010010000011 (hexadecimal 3483, octal 32203).
What is the square root of 13443?
About 115.9440.
Is 13443 divisible by 3?
Yes. Its digits add up to 15, a multiple of 3.
What is special about the number 13443?
13443 is a semiprime: 3 × 4481, the product of two primes.