The number 55490
55490 is a composite number with 16 divisors. Its prime factorisation is 2 × 5 × 31 × 179. Divisors (16): 1, 2, 5, 10, 31, 62, 155, 179, 310, 358, 895, 1790, 5549, 11098, 27745, 55490.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
55490 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55490 is composite. Its prime factorisation is
- 3
The divisors add up to 103680; without 55490 itself that is 48190, so 55490 is deficient (48190 is less than 55490). Euler's totient φ(55490) = 21360 numbers up to 55490 share no factor with it.
- 4
The digits of 55490 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 153 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55490 = 2 \times 5 \times 31 \times 179 \]
55490 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 103680 |
| Euler totient φ(n) | 21360 |
| Square | 3079140100 |
| Cube | 170861484149000 |
| Square root | 235.563155 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 153 |
| Scientific notation | 5.549 × |
55490 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand four hundred and ninety |
| Binary (base 2) | 1101100011000010 |
| Octal (base 8) | 154302 |
| Hexadecimal (base 16) | D8C2 |
| Base 3 | 2211010012 |
| As time | 55490 seconds = 15 h 24 min 50 s |
Is 55490 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (55490 ÷ 2 = 27745) | 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 | Yes (55490 ÷ 5 = 11098) | 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 1) | 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 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (55490 ÷ 10 = 5549) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 6) | 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 55490 a prime number?
No. 55490 = 2 × 5 × 31 × 179, so it is divisible by 2.
What are the factors of 55490?
1, 2, 5, 10, 31, 62, 155, 179, 310, 358, 895, 1790, 5549, 11098, 27745, 55490.
What is 55490 in binary?
1101100011000010 (hexadecimal D8C2, octal 154302).
What is the square root of 55490?
About 235.5632.
Is 55490 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 55490?
It is a composite number with 16 divisors.