776567domain: NAppears in sequencesLucas-Carmichael numbers with 3 prime factors.at n=33A216925Numbers n such that (i) number of divisors of n equals number of divisors of digit reversal of n, (ii) sum of divisors of n equals sum of divisors of digit reversal of n, and (iii) n is not a palindrome.at n=23A280354