The number 47771
47771 is a composite number with 8 divisors. Its prime factorisation is 23 × 31 × 67. Divisors (8): 1, 23, 31, 67, 713, 1541, 2077, 47771.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
47771 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
47771 is composite. Its prime factorisation is
- 3
The divisors add up to 52224; without 47771 itself that is 4453, so 47771 is deficient (4453 is less than 47771). Euler's totient φ(47771) = 43560 numbers up to 47771 share no factor with it.
- 4
The digits of 47771 add up to 26, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 189 steps to reach 1.
LaTeX source of the formulas on this page
\[ 47771 = 23 \times 31 \times 67 \]
47771 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 52224 |
| Euler totient φ(n) | 43560 |
| Square | 2282068441 |
| Cube | 109016691495011 |
| Square root | 218.565780 |
| Digit sum / digital root | 26 / 8 |
| Collatz steps to 1 | 189 |
| Scientific notation | 4.7771 × |
47771 in other forms
| Form | Value |
|---|---|
| In words | forty-seven thousand seven hundred and seventy-one |
| Binary (base 2) | 1011101010011011 |
| Octal (base 8) | 135233 |
| Hexadecimal (base 16) | BA9B |
| Base 3 | 2102112022 |
| As time | 47771 seconds = 13 h 16 min 11 s |
Is 47771 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 2) | 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 5) | 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 8) | 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 9) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 47771 a prime number?
No. 47771 = 23 × 31 × 67, so it is divisible by 23.
What are the factors of 47771?
1, 23, 31, 67, 713, 1541, 2077, 47771.
What is 47771 in binary?
1011101010011011 (hexadecimal BA9B, octal 135233).
What is the square root of 47771?
About 218.5658.
Is 47771 divisible by 3?
No. Its digits add up to 26, which is not a multiple of 3.
What is special about the number 47771?
It is a composite number with 8 divisors.