The number 55172
55172 is a composite number with 12 divisors. Its prime factorisation is × 13 × 1061. Divisors (12): 1, 2, 4, 13, 26, 52, 1061, 2122, 4244, 13793, 27586, 55172.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
55172 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55172 is composite. Its prime factorisation is
- 3
The divisors add up to 104076; without 55172 itself that is 48904, so 55172 is deficient (48904 is less than 55172). Euler's totient φ(55172) = 25440 numbers up to 55172 share no factor with it.
- 4
The digits of 55172 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 153 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55172 = 2^{2} \times 13 \times 1061 \]55172 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 12 |
| Sum of divisors | 104076 |
| Euler totient φ(n) | 25440 |
| Square | 3043949584 |
| Cube | 167940786448448 |
| Square root | 234.887207 (= 2√13793) |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 153 |
| Scientific notation | 5.5172 × |
55172 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand one hundred and seventy-two |
| Binary (base 2) | 1101011110000100 |
| Octal (base 8) | 153604 |
| Hexadecimal (base 16) | D784 |
| Base 3 | 2210200102 |
| As time | 55172 seconds = 15 h 19 min 32 s |
Is 55172 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (55172 ÷ 2 = 27586) | 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 | Yes (55172 ÷ 4 = 13793) | 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 4) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | 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 7) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 8) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55172 a prime number?
No. 55172 = × 13 × 1061, so it is divisible by 2.
What are the factors of 55172?
1, 2, 4, 13, 26, 52, 1061, 2122, 4244, 13793, 27586, 55172.
What is 55172 in binary?
1101011110000100 (hexadecimal D784, octal 153604).
What is the square root of 55172?
About 234.8872, exactly 2√13793.
Is 55172 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 55172?
It is a composite number with 12 divisors.