227473

Properties

Appears in sequences

• Numbers n such that pi(n)=10^pi(d_1)+10^pi(d_2)+...+10^pi(d_k) where d_1d_2...d_k is the decimal expansion of n.at n=0A139411
• Primes of the form 2*n^2 + 54*n + 25.at n=24A217497
• Prime numbersat n=20220