The number 55143
55143 is a composite number with 12 divisors. Its prime factorisation is × 11 × 557. Divisors (12): 1, 3, 9, 11, 33, 99, 557, 1671, 5013, 6127, 18381, 55143.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
55143 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55143 is composite. Its prime factorisation is
- 3
The divisors add up to 87048; without 55143 itself that is 31905, so 55143 is deficient (31905 is less than 55143). Euler's totient φ(55143) = 33360 numbers up to 55143 share no factor with it.
- 4
The digits of 55143 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 184 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55143 = 3^{2} \times 11 \times 557 \]55143 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 12 |
| Sum of divisors | 87048 |
| Euler totient φ(n) | 33360 |
| Square | 3040750449 |
| Cube | 167676102009207 |
| Square root | 234.825467 (= 3√6127) |
| Digit sum / digital root | 18 / 9 |
| Collatz steps to 1 | 184 |
| Scientific notation | 5.5143 × |
55143 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand one hundred and forty-three |
| Binary (base 2) | 1101011101100111 |
| Octal (base 8) | 153547 |
| Hexadecimal (base 16) | D767 |
| Base 3 | 2210122100 |
| As time | 55143 seconds = 15 h 19 min 3 s |
Is 55143 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 (55143 ÷ 3 = 18381) | 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 | No (remainder 3) | 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 4) | 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 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | Yes (55143 ÷ 9 = 6127) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 3) | A number is divisible by 10 if the last digit is 0. |
| 11 | Yes (55143 ÷ 11 = 5013) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55143 a prime number?
No. 55143 = × 11 × 557, so it is divisible by 3.
What are the factors of 55143?
1, 3, 9, 11, 33, 99, 557, 1671, 5013, 6127, 18381, 55143.
What is 55143 in binary?
1101011101100111 (hexadecimal D767, octal 153547).
What is the square root of 55143?
About 234.8255, exactly 3√6127.
Is 55143 divisible by 3?
Yes. Its digits add up to 18, a multiple of 3.
What is special about the number 55143?
It is a composite number with 12 divisors.