The number 49115
49115 is a composite number with 16 divisors. Its prime factorisation is 5 × 11 × 19 × 47. Divisors (16): 1, 5, 11, 19, 47, 55, 95, 209, 235, 517, 893, 1045, 2585, 4465, 9823, 49115.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
49115 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
49115 is composite. Its prime factorisation is
- 3
The divisors add up to 69120; without 49115 itself that is 20005, so 49115 is deficient (20005 is less than 49115). Euler's totient φ(49115) = 33120 numbers up to 49115 share no factor with it.
- 4
The digits of 49115 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 65 steps to reach 1.
LaTeX source of the formulas on this page
\[ 49115 = 5 \times 11 \times 19 \times 47 \]
49115 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 69120 |
| Euler totient φ(n) | 33120 |
| Square | 2412283225 |
| Cube | 118479290595875 |
| Square root | 221.619043 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 65 |
| Scientific notation | 4.9115 × |
49115 in other forms
| Form | Value |
|---|---|
| In words | forty-nine thousand one hundred and fifteen |
| Binary (base 2) | 1011111111011011 |
| Octal (base 8) | 137733 |
| Hexadecimal (base 16) | BFDB |
| Base 3 | 2111101002 |
| As time | 49115 seconds = 13 h 38 min 35 s |
Is 49115 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 2) | 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 | Yes (49115 ÷ 5 = 9823) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 5) | 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 5) | A number is divisible by 10 if the last digit is 0. |
| 11 | Yes (49115 ÷ 11 = 4465) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 49115 a prime number?
No. 49115 = 5 × 11 × 19 × 47, so it is divisible by 5.
What are the factors of 49115?
1, 5, 11, 19, 47, 55, 95, 209, 235, 517, 893, 1045, 2585, 4465, 9823, 49115.
What is 49115 in binary?
1011111111011011 (hexadecimal BFDB, octal 137733).
What is the square root of 49115?
About 221.6190.
Is 49115 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 49115?
It is a composite number with 16 divisors.