The number 43381
43381 is a composite number with 8 divisors. Its prime factorisation is 13 × 47 × 71. Divisors (8): 1, 13, 47, 71, 611, 923, 3337, 43381.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
43381 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
43381 is composite. Its prime factorisation is
- 3
The divisors add up to 48384; without 43381 itself that is 5003, so 43381 is deficient (5003 is less than 43381). Euler's totient φ(43381) = 38640 numbers up to 43381 share no factor with it.
- 4
The digits of 43381 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 119 steps to reach 1.
LaTeX source of the formulas on this page
\[ 43381 = 13 \times 47 \times 71 \]
43381 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 48384 |
| Euler totient φ(n) | 38640 |
| Square | 1881911161 |
| Cube | 81639188075341 |
| Square root | 208.281060 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 119 |
| Scientific notation | 4.3381 × |
43381 in other forms
| Form | Value |
|---|---|
| In words | forty-three thousand three hundred and eighty-one |
| Binary (base 2) | 1010100101110101 |
| Octal (base 8) | 124565 |
| Hexadecimal (base 16) | A975 |
| Base 3 | 2012111201 |
| As time | 43381 seconds = 12 h 3 min 1 s |
Is 43381 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 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 1) | 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 | No (remainder 2) | 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 5) | 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 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 8) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 43381 a prime number?
No. 43381 = 13 × 47 × 71, so it is divisible by 13.
What are the factors of 43381?
1, 13, 47, 71, 611, 923, 3337, 43381.
What is 43381 in binary?
1010100101110101 (hexadecimal A975, octal 124565).
What is the square root of 43381?
About 208.2811.
Is 43381 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 43381?
It is a composite number with 8 divisors.