The number 27221
27221 is a composite number with 4 divisors. Its prime factorisation is 163 × 167. Divisors (4): 1, 163, 167, 27221.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 27221: a semiprime: 163 × 167, the product of two primes.
- 2
27221 is composite. Its prime factorisation is
- 3
The divisors add up to 27552; without 27221 itself that is 331, so 27221 is deficient (331 is less than 27221). Euler's totient φ(27221) = 26892 numbers up to 27221 share no factor with it.
- 4
The digits of 27221 add up to 14, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 64 steps to reach 1.
LaTeX source of the formulas on this page
\[ 27221 = 163 \times 167 \]
27221 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 27552 |
| Euler totient φ(n) | 26892 |
| Square | 740982841 |
| Cube | 20170293914861 |
| Square root | 164.987878 |
| Digit sum / digital root | 14 / 5 |
| Collatz steps to 1 | 64 |
| Scientific notation | 2.7221 × |
27221 in other forms
| Form | Value |
|---|---|
| In words | twenty-seven thousand two hundred and twenty-one |
| Binary (base 2) | 110101001010101 |
| Octal (base 8) | 65125 |
| Hexadecimal (base 16) | 6A55 |
| Base 3 | 1101100012 |
| As time | 27221 seconds = 7 h 33 min 41 s |
Is 27221 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 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 5) | 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 5) | 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 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 7) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 27221 a prime number?
No. 27221 = 163 × 167, so it is divisible by 163.
What are the factors of 27221?
1, 163, 167, 27221.
What is 27221 in binary?
110101001010101 (hexadecimal 6A55, octal 65125).
What is the square root of 27221?
About 164.9879.
Is 27221 divisible by 3?
No. Its digits add up to 14, which is not a multiple of 3.
What is special about the number 27221?
27221 is a semiprime: 163 × 167, the product of two primes.