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.
is_symmetrical(7227) ➞ true
is_symmetrical(12567) ➞ false
is_symmetrical(44444444) ➞ true
is_symmetrical(9939) ➞ false
is_symmetrical(1112111) ➞ trueN/A