Can anyone explain the concept of palindrome number?

Question

https://code.sololearn.com/cfWwvo7mhN5g/?ref=app

Answer 1

They read the same backwards and fowards.

12321 is a palindrome. flip 12321
4554 is a palindrome. flip: 4554

Answer 2

Here is a perfect example

https://code.sololearn.com/c18Ltdc8It25/?ref=app