The number 80015
80015 is a composite number with 8 divisors. Its prime factorisation is 5 × 13 × 1231. Divisors (8): 1, 5, 13, 65, 1231, 6155, 16003, 80015.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
80015 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
80015 is composite. Its prime factorisation is
- 3
The divisors add up to 103488; without 80015 itself that is 23473, so 80015 is deficient (23473 is less than 80015). Euler's totient φ(80015) = 59040 numbers up to 80015 share no factor with it.
- 4
The digits of 80015 add up to 14, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 76 steps to reach 1.
LaTeX source of the formulas on this page
\[ 80015 = 5 \times 13 \times 1231 \]
80015 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 103488 |
| Euler totient φ(n) | 59040 |
| Square | 6402400225 |
| Cube | 512288054003375 |
| Square root | 282.869228 |
| Digit sum / digital root | 14 / 5 |
| Collatz steps to 1 | 76 |
| Scientific notation | 8.0015 × |
80015 in other forms
| Form | Value |
|---|---|
| In words | eighty thousand and fifteen |
| Binary (base 2) | 10011100010001111 |
| Octal (base 8) | 234217 |
| Hexadecimal (base 16) | 1388F |
| Base 3 | 11001202112 |
| As time | 80015 seconds = 22 h 13 min 35 s |
Is 80015 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 (80015 ÷ 5 = 16003) | 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 5) | 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 5) | 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 | No (remainder 1) | 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 80015 a prime number?
No. 80015 = 5 × 13 × 1231, so it is divisible by 5.
What are the factors of 80015?
1, 5, 13, 65, 1231, 6155, 16003, 80015.
What is 80015 in binary?
10011100010001111 (hexadecimal 1388F, octal 234217).
What is the square root of 80015?
About 282.8692.
Is 80015 divisible by 3?
No. Its digits add up to 14, which is not a multiple of 3.
What is special about the number 80015?
It is a composite number with 8 divisors.