72959domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form n + sum of proper non-divisors of n.at n=40A192560Numbers that cannot be expressed as sum of at most nine repdigits numbers. One may not add two integers with the same repeated digit.at n=28A339673Primes p such that 2*p is a member of A230624.at n=24A349820Prime numbersat n=7215