Badulla - Badu Numbers-------- Fixed

: The fixed-line area code for Badulla is 055 , while nearby Bandarawela uses 057 .

One of the most striking features of Badulla Badu Numbers is their ability to retain their numerical value when their digits are reversed and multiplied by 2. For instance, the number 12, when reversed, becomes 21, and multiplying it by 2 yields 42, which is not equal to 12. However, certain numbers, such as 0, 1, and 2, do exhibit this property. Badulla Badu Numbers--------

In modern number theory, newly defined sequences often find use in cryptography. If we define as those that are both pseudoprime to base 2 and non-palindromic but become palindromic after reversing digits and multiplying by the original number’s digit sum, they could serve as keys in hash functions. : The fixed-line area code for Badulla is