15551551domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes that contain digits 1 and 5 only.at n=32A020453Primes containing only two distinct digits whose sum of digits is 28, the second perfect number.at n=13A048518Smallest prime whose product of digits is 5^n.at n=5A090840Prime numbersat n=1004019