Q: What is the negative version of the number 15,521,221?
A: -15,521,221
Negative numbers are usually written with - in front of them. They represent a number that is less than zero.
Here are more examples of negative numbers in sequence:
| 15,521,219 | 15,521,220 | 15,521,222 | 15,521,223 |
| -15,521,219 | -15,521,220 | -15,521,222 | -15,521,223 |