51581

Properties

Appears in sequences

• Middle of 3 consecutive prime numbers such that p1*p2*p3+d1+d2+1=average of twin prime pairs, d1(delta)=p2-p1,d2(delta)=p3-p2.at n=6A153407
• Primes that are the sum of the squares of three integers that form an arithmetic sequence with difference 7.at n=14A227994
• Odd primes p for which there are exactly as many primes in the range [prevprime(p)^2, prevprime(p)*p] as there are in the range [prevprime(p)*p, p^2], where prevprime(p) gives the previous prime before prime p.at n=42A256473
• Prime numbers such that the product of their digits equals twice the number of their digits times the sum of their digits.at n=4A343701
• Primes having only {1, 5, 8} as digits.at n=24A385780
• Prime numbersat n=5279