num = int(input("Enter number: "))
rev = int(str(num)[::-1])
print(rev)

Enter number:  0


0

num = int(input("Enter number: "))
print(len(str(num)))

Enter number:  5


1

num = int(input("Enter number: "))
sum = 0
temp = num
while temp > 0:
    digit = temp % 10
    sum += digit**3
    temp //= 10

if num == sum:
    print("Armstrong")
else:
    print("Not Armstrong")

Enter number:  4


Not Armstrong