Search a number
plaindrome  and  pronic n.

Search a number

(max 15 digits)

First numbers that belong to both sets:

2, 6, 12, 56, 156, 1122, 2256, 4556, 11556, 111222, 445556, 11112222, 44455556, 222233556, 1111122222, 4444555556, 111111222222, 444445555556, 11111112222222, 44444455555556.