MathDB
NT hand job

Source: Cono Sur 2024/P4

September 29, 2024

Problem Statement

Let NN be a positive integer with 2k2k digits. Its chunks are defined by the two numbers formed by the digits from 11 to kk and k+1k+1 to 2k2k (e.g. the chunks of 142856 are 142 and 856). We define the NN-reverse as the number formed by switching its chunks (e.g. the reverse of 142856 is 856142 and for 1401 it is 114). We call a number cearense is it satisfies the following conditions:
[*] Has an even number of digits [*] Its chunks are relatively prime [*]Divides its reverse
Find the two smallest cearense integer.