Q: Is 21,007,517 a Palindrome?
A: No, the number 21,007,517 is not a palindrome.
A palindromic number is number that remains the same when its digits are reversed.
Here's how to check if a number is a palindrome:
Step 1
Take the original number and reverse it.
Here is the original number color coded:
21007517
Now we reverse it like this:
71570012
Notice the colors are going in the opposite direction now
Step 2
Compare the two numbers. If they are exactly the same then the number is a palindrome.
Is 21007517 = 71570012?
Answer:
NO, so that means the number 21,007,517 is not a palindrome!
Here are more examples of potential palindrome numbers in sequence:
| Number | 21,007,515 | 21,007,516 | 21,007,518 | 21,007,519 |
| Palindrome? | no | no | no | no |