The number 55783
55783 is a composite number with 8 divisors. Its prime factorisation is 7 × 13 × 613. Divisors (8): 1, 7, 13, 91, 613, 4291, 7969, 55783.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
55783 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55783 is composite. Its prime factorisation is
- 3
The divisors add up to 68768; without 55783 itself that is 12985, so 55783 is deficient (12985 is less than 55783). Euler's totient φ(55783) = 44064 numbers up to 55783 share no factor with it.
- 4
The digits of 55783 add up to 28, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 184 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55783 = 7 \times 13 \times 613 \]
55783 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 68768 |
| Euler totient φ(n) | 44064 |
| Square | 3111743089 |
| Cube | 173582364733687 |
| Square root | 236.184250 |
| Digit sum / digital root | 28 / 1 |
| Collatz steps to 1 | 184 |
| Scientific notation | 5.5783 × |
55783 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand seven hundred and eighty-three |
| Binary (base 2) | 1101100111100111 |
| Octal (base 8) | 154747 |
| Hexadecimal (base 16) | D9E7 |
| Base 3 | 2211112001 |
| As time | 55783 seconds = 15 h 29 min 43 s |
Is 55783 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 | No (remainder 1) | 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 3) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (55783 ÷ 7 = 7969) | 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 7) | 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 | No (remainder 3) | 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 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55783 a prime number?
No. 55783 = 7 × 13 × 613, so it is divisible by 7.
What are the factors of 55783?
1, 7, 13, 91, 613, 4291, 7969, 55783.
What is 55783 in binary?
1101100111100111 (hexadecimal D9E7, octal 154747).
What is the square root of 55783?
About 236.1843.
Is 55783 divisible by 3?
No. Its digits add up to 28, which is not a multiple of 3.
What is special about the number 55783?
It is a composite number with 8 divisors.