The number 27081
27081 is a composite number with 16 divisors. Its prime factorisation is × 17 × 59. Divisors (16): 1, 3, 9, 17, 27, 51, 59, 153, 177, 459, 531, 1003, 1593, 3009, 9027, 27081.
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How to work it out
- 1
27081 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
27081 is composite. Its prime factorisation is
- 3
The divisors add up to 43200; without 27081 itself that is 16119, so 27081 is deficient (16119 is less than 27081). Euler's totient φ(27081) = 16704 numbers up to 27081 share no factor with it.
- 4
The digits of 27081 add up to 18, and repeating that until one digit is left gives the digital root 9. The Collatz sequence (halve if even, else 3n+1) takes 90 steps to reach 1.
LaTeX source of the formulas on this page
\[ 27081 = 3^{3} \times 17 \times 59 \]27081 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 43200 |
| Euler totient φ(n) | 16704 |
| Square | 733380561 |
| Cube | 19860678972441 |
| Square root | 164.563058 (= 3√3009) |
| Digit sum / digital root | 18 / 9 |
| Collatz steps to 1 | 90 |
| Scientific notation | 2.7081 × |
27081 in other forms
| Form | Value |
|---|---|
| In words | twenty-seven thousand and eighty-one |
| Binary (base 2) | 110100111001001 |
| Octal (base 8) | 64711 |
| Hexadecimal (base 16) | 69C9 |
| Base 3 | 1101011000 |
| As time | 27081 seconds = 7 h 31 min 21 s |
Is 27081 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 (27081 ÷ 3 = 9027) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 1) | 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 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | Yes (27081 ÷ 9 = 3009) | 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 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 27081 a prime number?
No. 27081 = × 17 × 59, so it is divisible by 3.
What are the factors of 27081?
1, 3, 9, 17, 27, 51, 59, 153, 177, 459, 531, 1003, 1593, 3009, 9027, 27081.
What is 27081 in binary?
110100111001001 (hexadecimal 69C9, octal 64711).
What is the square root of 27081?
About 164.5631, exactly 3√3009.
Is 27081 divisible by 3?
Yes. Its digits add up to 18, a multiple of 3.
What is special about the number 27081?
It is a composite number with 16 divisors.