Since divisibility by 2 and 5 is such a problem, why not look for memorable numbers in prime base, like base 7 or base 11?
What about palindromes in binary ? That's about as close to a mathematical ideal as we could get. Yes?
Let's see. decimal 11 = binary 1011, its palindrome = 1101 = decimal 13, GOLD!
They're all technically palindromes in base-2.