50235

Appears in sequences

• Numbers k such that k^2 contains only digits {2,3,5}.at n=7A053918
• Odd composite numbers k such that cototient(k) - phi(k) = k - 2*phi(k) is an odd prime.at n=14A083255
• Numbers k such that 4^k*(2^k - 1) + 1 is a prime.at n=10A098856
• Numbers k such that k and k^2 use only the digits 0, 2, 3 and 5.at n=20A136887
• Numbers k such that k and k^2 use only the digits 0, 2, 3, 5 and 7.at n=22A136889
• Numbers k such that k and k^2 use only the digits 0, 2, 3, 5 and 8.at n=27A136890
• Numbers k such that k and k^2 use only the digits 0, 2, 3, 5 and 9.at n=57A136891
• Numbers n such that the decimal digits of n^2 are all prime.at n=19A275971
• Numbers n such that cototient(n) does not divide phi(n!).at n=6A291597
• Terms of A051488 that do not belong to A083207.at n=7A333232
• Numbers k such that A061201(k) is divisible by k.at n=7A355541