The number 55450
55450 is a composite number with 12 divisors. Its prime factorisation is 2 × × 1109. Divisors (12): 1, 2, 5, 10, 25, 50, 1109, 2218, 5545, 11090, 27725, 55450.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 55450: a happy number: repeatedly adding the squares of its digits reaches 1.
- 2
55450 is composite. Its prime factorisation is
- 3
The divisors add up to 103230; without 55450 itself that is 47780, so 55450 is deficient (47780 is less than 55450). Euler's totient φ(55450) = 22160 numbers up to 55450 share no factor with it.
- 4
The digits of 55450 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 153 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55450 = 2 \times 5^{2} \times 1109 \]55450 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 12 |
| Sum of divisors | 103230 |
| Euler totient φ(n) | 22160 |
| Square | 3074702500 |
| Cube | 170492253625000 |
| Square root | 235.478237 (= 5√2218) |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 153 |
| Scientific notation | 5.545 × |
55450 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand four hundred and fifty |
| Binary (base 2) | 1101100010011010 |
| Octal (base 8) | 154232 |
| Hexadecimal (base 16) | D89A |
| Base 3 | 2211001201 |
| As time | 55450 seconds = 15 h 24 min 10 s |
Is 55450 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (55450 ÷ 2 = 27725) | 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 (55450 ÷ 5 = 11090) | 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 | No (remainder 3) | 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 (55450 ÷ 10 = 5545) | 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 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55450 a prime number?
No. 55450 = 2 × × 1109, so it is divisible by 2.
What are the factors of 55450?
1, 2, 5, 10, 25, 50, 1109, 2218, 5545, 11090, 27725, 55450.
What is 55450 in binary?
1101100010011010 (hexadecimal D89A, octal 154232).
What is the square root of 55450?
About 235.4782, exactly 5√2218.
Is 55450 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 55450?
55450 is a happy number: repeatedly adding the squares of its digits reaches 1.