Create a function that takes a number as an argument and returns true or false depending on whether the number is symmetrical or not. A number is symmetrical when it is the same as its reverse.
isSymmetrical(7227) ➞ true
isSymmetrical(12567) ➞ false
isSymmetrical(44444444) ➞ true
isSymmetrical(9939) ➞ false
isSymmetrical(1112111) ➞ true
N/A