The number 51442
51442 is a composite number with 12 divisors. Its prime factorisation is 2 × × 89. Divisors (12): 1, 2, 17, 34, 89, 178, 289, 578, 1513, 3026, 25721, 51442.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
51442 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
51442 is composite. Its prime factorisation is
- 3
The divisors add up to 82890; without 51442 itself that is 31448, so 51442 is deficient (31448 is less than 51442). Euler's totient φ(51442) = 23936 numbers up to 51442 share no factor with it.
- 4
The digits of 51442 add up to 16, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 171 steps to reach 1.
LaTeX source of the formulas on this page
\[ 51442 = 2 \times 17^{2} \times 89 \]51442 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 12 |
| Sum of divisors | 82890 |
| Euler totient φ(n) | 23936 |
| Square | 2646279364 |
| Cube | 136129903042888 |
| Square root | 226.808289 (= 17√178) |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 171 |
| Scientific notation | 5.1442 × |
51442 in other forms
| Form | Value |
|---|---|
| In words | fifty-one thousand four hundred and forty-two |
| Binary (base 2) | 1100100011110010 |
| Octal (base 8) | 144362 |
| Hexadecimal (base 16) | C8F2 |
| Base 3 | 2121120021 |
| As time | 51442 seconds = 14 h 17 min 22 s |
Is 51442 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (51442 ÷ 2 = 25721) | 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 | No (remainder 2) | 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 6) | 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 7) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 2) | 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 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 51442 a prime number?
No. 51442 = 2 × × 89, so it is divisible by 2.
What are the factors of 51442?
1, 2, 17, 34, 89, 178, 289, 578, 1513, 3026, 25721, 51442.
What is 51442 in binary?
1100100011110010 (hexadecimal C8F2, octal 144362).
What is the square root of 51442?
About 226.8083, exactly 17√178.
Is 51442 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 51442?
It is a composite number with 12 divisors.