The number 43243
43243 is a composite number with 4 divisors. Its prime factorisation is 83 × 521. Divisors (4): 1, 83, 521, 43243.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 43243: a semiprime: 83 × 521, the product of two primes.
- 2
43243 is composite. Its prime factorisation is
- 3
The divisors add up to 43848; without 43243 itself that is 605, so 43243 is deficient (605 is less than 43243). Euler's totient φ(43243) = 42640 numbers up to 43243 share no factor with it.
- 4
The digits of 43243 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 75 steps to reach 1.
LaTeX source of the formulas on this page
\[ 43243 = 83 \times 521 \]
43243 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 43848 |
| Euler totient φ(n) | 42640 |
| Square | 1869957049 |
| Cube | 80862552669907 |
| Square root | 207.949513 |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 75 |
| Scientific notation | 4.3243 × |
43243 in other forms
| Form | Value |
|---|---|
| In words | forty-three thousand two hundred and forty-three |
| Binary (base 2) | 1010100011101011 |
| Octal (base 8) | 124353 |
| Hexadecimal (base 16) | A8EB |
| Base 3 | 2012022121 |
| As time | 43243 seconds = 12 h 0 min 43 s |
Is 43243 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 | No (remainder 3) | 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 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 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 3) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 2) | 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 43243 a prime number?
No. 43243 = 83 × 521, so it is divisible by 83.
What are the factors of 43243?
1, 83, 521, 43243.
What is 43243 in binary?
1010100011101011 (hexadecimal A8EB, octal 124353).
What is the square root of 43243?
About 207.9495.
Is 43243 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 43243?
43243 is a semiprime: 83 × 521, the product of two primes.