The number 55090
55090 is a composite number with 16 divisors. Its prime factorisation is 2 × 5 × 7 × 787. Divisors (16): 1, 2, 5, 7, 10, 14, 35, 70, 787, 1574, 3935, 5509, 7870, 11018, 27545, 55090.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
55090 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55090 is composite. Its prime factorisation is
- 3
The divisors add up to 113472; without 55090 itself that is 58382, so 55090 is abundant (58382 is more than 55090). Euler's totient φ(55090) = 18864 numbers up to 55090 share no factor with it.
- 4
The digits of 55090 add up to 19, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 60 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55090 = 2 \times 5 \times 7 \times 787 \]
55090 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 113472 |
| Euler totient φ(n) | 18864 |
| Square | 3034908100 |
| Cube | 167193087229000 |
| Square root | 234.712590 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 60 |
| Scientific notation | 5.509 × |
55090 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand and ninety |
| Binary (base 2) | 1101011100110010 |
| Octal (base 8) | 153462 |
| Hexadecimal (base 16) | D732 |
| Base 3 | 2210120101 |
| As time | 55090 seconds = 15 h 18 min 10 s |
Is 55090 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (55090 ÷ 2 = 27545) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 1) | 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 | Yes (55090 ÷ 5 = 11018) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (55090 ÷ 7 = 7870) | 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 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 1) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (55090 ÷ 10 = 5509) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 2) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55090 a prime number?
No. 55090 = 2 × 5 × 7 × 787, so it is divisible by 2.
What are the factors of 55090?
1, 2, 5, 7, 10, 14, 35, 70, 787, 1574, 3935, 5509, 7870, 11018, 27545, 55090.
What is 55090 in binary?
1101011100110010 (hexadecimal D732, octal 153462).
What is the square root of 55090?
About 234.7126.
Is 55090 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 55090?
It is a composite number with 16 divisors.