The number 47822
47822 is a composite number with 4 divisors. Its prime factorisation is 2 × 23911. Divisors (4): 1, 2, 23911, 47822.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 47822: a semiprime: 2 × 23911, the product of two primes.
- 2
47822 is composite. Its prime factorisation is
- 3
The divisors add up to 71736; without 47822 itself that is 23914, so 47822 is deficient (23914 is less than 47822). Euler's totient φ(47822) = 23910 numbers up to 47822 share no factor with it.
- 4
The digits of 47822 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 176 steps to reach 1.
LaTeX source of the formulas on this page
\[ 47822 = 2 \times 23911 \]
47822 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 71736 |
| Euler totient φ(n) | 23910 |
| Square | 2286943684 |
| Cube | 109366220856248 |
| Square root | 218.682418 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 176 |
| Scientific notation | 4.7822 × |
47822 in other forms
| Form | Value |
|---|---|
| In words | forty-seven thousand eight hundred and twenty-two |
| Binary (base 2) | 1011101011001110 |
| Octal (base 8) | 135316 |
| Hexadecimal (base 16) | BACE |
| Base 3 | 2102121012 |
| As time | 47822 seconds = 13 h 17 min 2 s |
Is 47822 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (47822 ÷ 2 = 23911) | 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 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 2) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 2) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 5) | 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 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 2) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 5) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 47822 a prime number?
No. 47822 = 2 × 23911, so it is divisible by 2.
What are the factors of 47822?
1, 2, 23911, 47822.
What is 47822 in binary?
1011101011001110 (hexadecimal BACE, octal 135316).
What is the square root of 47822?
About 218.6824.
Is 47822 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 47822?
47822 is a semiprime: 2 × 23911, the product of two primes.