62568

Appears in sequences

• Treated as strings, phi(n) is a substring of sigma(n).at n=31A074452
• Numbers k such that 2^k - 1 is divisible by (k-1).at n=36A087965
• Numbers n such that sigma(n) = 10*phi(n) (where sigma=A000203, phi=A000010).at n=12A171256