The number 55142
55142 is a composite number with 8 divisors. Its prime factorisation is 2 × 79 × 349. Divisors (8): 1, 2, 79, 158, 349, 698, 27571, 55142.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
55142 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55142 is composite. Its prime factorisation is
- 3
The divisors add up to 84000; without 55142 itself that is 28858, so 55142 is deficient (28858 is less than 55142). Euler's totient φ(55142) = 27144 numbers up to 55142 share no factor with it.
- 4
The digits of 55142 add up to 17, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 60 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55142 = 2 \times 79 \times 349 \]
55142 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 84000 |
| Euler totient φ(n) | 27144 |
| Square | 3040640164 |
| Cube | 167666979923288 |
| Square root | 234.823338 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 60 |
| Scientific notation | 5.5142 × |
55142 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand one hundred and forty-two |
| Binary (base 2) | 1101011101100110 |
| Octal (base 8) | 153546 |
| Hexadecimal (base 16) | D766 |
| Base 3 | 2210122022 |
| As time | 55142 seconds = 15 h 19 min 2 s |
Is 55142 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (55142 ÷ 2 = 27571) | 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 2) | 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 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 6) | 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 2) | 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 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55142 a prime number?
No. 55142 = 2 × 79 × 349, so it is divisible by 2.
What are the factors of 55142?
1, 2, 79, 158, 349, 698, 27571, 55142.
What is 55142 in binary?
1101011101100110 (hexadecimal D766, octal 153546).
What is the square root of 55142?
About 234.8233.
Is 55142 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 55142?
It is a composite number with 8 divisors.