I'd like to hear insights and theory of the mirror numbers and their possible significance in mathematics and geometry. With mirror numbers I mean these four examples:
432 -> 234 123 -> 321 153 -> 351 987 -> 789
Sum of 432 & 234 is 666 and sum of 153 & 351 is 504, which are famous numbers from historical perspective, namely from Pythagoras, Plato, Archimedes and Revelation of John.
Supplementing questions arose on a chat with Dan:
1) How to determine if a number x can be represented as n + rev(n)?
2) How to determine possible n & rev(n) for number x?