The number 55131
55131 is a composite number with 16 divisors. Its prime factorisation is 3 × 17 × 23 × 47. Divisors (16): 1, 3, 17, 23, 47, 51, 69, 141, 391, 799, 1081, 1173, 2397, 3243, 18377, 55131.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
55131 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55131 is composite. Its prime factorisation is
- 3
The divisors add up to 82944; without 55131 itself that is 27813, so 55131 is deficient (27813 is less than 55131). Euler's totient φ(55131) = 32384 numbers up to 55131 share no factor with it.
- 4
The digits of 55131 add up to 15, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 166 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55131 = 3 \times 17 \times 23 \times 47 \]
55131 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 82944 |
| Euler totient φ(n) | 32384 |
| Square | 3039427161 |
| Cube | 167566658813091 |
| Square root | 234.799915 |
| Digit sum / digital root | 15 / 6 |
| Collatz steps to 1 | 166 |
| Scientific notation | 5.5131 × |
55131 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand one hundred and thirty-one |
| Binary (base 2) | 1101011101011011 |
| Octal (base 8) | 153533 |
| Hexadecimal (base 16) | D75B |
| Base 3 | 2210121220 |
| As time | 55131 seconds = 15 h 18 min 51 s |
Is 55131 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 (55131 ÷ 3 = 18377) | 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 1) | 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 6) | 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 6) | 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 10) | 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 55131 a prime number?
No. 55131 = 3 × 17 × 23 × 47, so it is divisible by 3.
What are the factors of 55131?
1, 3, 17, 23, 47, 51, 69, 141, 391, 799, 1081, 1173, 2397, 3243, 18377, 55131.
What is 55131 in binary?
1101011101011011 (hexadecimal D75B, octal 153533).
What is the square root of 55131?
About 234.7999.
Is 55131 divisible by 3?
Yes. Its digits add up to 15, a multiple of 3.
What is special about the number 55131?
It is a composite number with 16 divisors.