The number 55389
55389 is a composite number with 8 divisors. Its prime factorisation is 3 × 37 × 499. Divisors (8): 1, 3, 37, 111, 499, 1497, 18463, 55389.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
55389 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55389 is composite. Its prime factorisation is
- 3
The divisors add up to 76000; without 55389 itself that is 20611, so 55389 is deficient (20611 is less than 55389). Euler's totient φ(55389) = 35856 numbers up to 55389 share no factor with it.
- 4
The digits of 55389 add up to 30, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 91 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55389 = 3 \times 37 \times 499 \]
55389 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 76000 |
| Euler totient φ(n) | 35856 |
| Square | 3067941321 |
| Cube | 169930201828869 |
| Square root | 235.348677 |
| Digit sum / digital root | 30 / 3 |
| Collatz steps to 1 | 91 |
| Scientific notation | 5.5389 × |
55389 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand three hundred and eighty-nine |
| Binary (base 2) | 1101100001011101 |
| Octal (base 8) | 154135 |
| Hexadecimal (base 16) | D85D |
| Base 3 | 2210222110 |
| As time | 55389 seconds = 15 h 23 min 9 s |
Is 55389 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 (55389 ÷ 3 = 18463) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 4) | 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 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 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 3) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 4) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55389 a prime number?
No. 55389 = 3 × 37 × 499, so it is divisible by 3.
What are the factors of 55389?
1, 3, 37, 111, 499, 1497, 18463, 55389.
What is 55389 in binary?
1101100001011101 (hexadecimal D85D, octal 154135).
What is the square root of 55389?
About 235.3487.
Is 55389 divisible by 3?
Yes. Its digits add up to 30, a multiple of 3.
What is special about the number 55389?
It is a composite number with 8 divisors.