The number 275
275 is a composite number with 6 divisors. Its prime factorisation is × 11. Divisors (6): 1, 5, 11, 25, 55, 275.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
275 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
275 is composite. Its prime factorisation is
- 3
The divisors add up to 372; without 275 itself that is 97, so 275 is deficient (97 is less than 275). Euler's totient φ(275) = 200 numbers up to 275 share no factor with it.
- 4
The digits of 275 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 91 steps to reach 1.
LaTeX source of the formulas on this page
\[ 275 = 5^{2} \times 11 \]275 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 6 |
| Sum of divisors | 372 |
| Euler totient φ(n) | 200 |
| Square | 75625 |
| Cube | 20796875 |
| Square root | 16.583124 (= 5√11) |
| Digit sum / digital root | 14 / 5 |
| Collatz steps to 1 | 91 |
| Scientific notation | 2.75 × |
275 in other forms
| Form | Value |
|---|---|
| In words | two hundred and seventy-five |
| Roman numerals | CCLXXV |
| Binary (base 2) | 100010011 |
| Octal (base 8) | 423 |
| Hexadecimal (base 16) | 113 |
| Base 3 | 101012 |
| As time | 275 seconds = 4 min 35 s |
Is 275 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 | Yes (275 ÷ 5 = 55) | 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 2) | 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 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 5) | A number is divisible by 10 if the last digit is 0. |
| 11 | Yes (275 ÷ 11 = 25) | 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 275 a prime number?
No. 275 = × 11, so it is divisible by 5.
What are the factors of 275?
1, 5, 11, 25, 55, 275.
What is 275 in binary?
100010011 (hexadecimal 113, octal 423).
What is the square root of 275?
About 16.5831, exactly 5√11.
What is 275 in Roman numerals?
CCLXXV.
Is 275 divisible by 3?
No. Its digits add up to 14, which is not a multiple of 3.
What is special about the number 275?
It is a composite number with 6 divisors.