72227

Properties

Appears in sequences

• Primes that contain digits 2 and 7 only.at n=11A020459
• Palindromic prime lengths of factorials: see A035067.at n=27A035068
• Palindromic terms from A019546.at n=14A045336
• Palindromic primes containing at least one pair of consecutive equal digits.at n=8A050786
• a(n) = smallest palindrome > a(n-1) such that a(1)*a(2)*...*a(n) - 1 is a prime.at n=42A051954
• Palindromic primes using only two distinct digits and only the exterior digit is different.at n=19A056728
• Palindromic primes with just two distinct digits.at n=25A056730
• Palindromic primes with just two distinct prime digits.at n=7A058375
• Twin primes belonging to packs of four or more twin pairs.at n=18A068220
• Primes which are a sandwich of numbers made of only one digit between two 7's.at n=4A068688
• Primes which can be represented as the sum of a triangular number and its reverse.at n=5A072386
• Palindromic primes with middle digit 2.at n=8A082438
• Palindromic primes whose digital root equals their middle digits.at n=6A082518
• Larger of a pair of consecutive primes having only prime digits.at n=29A082756
• a(n) = smallest palindromic prime that begins with A082768(n) and contains more than twice the number of digits in A082768(n), or 0 if no such number exists.at n=26A082770
• Palindromic primes p with property that another palindromic prime with as many digits can be obtained by using all the digits of p with a different frequency >=1 (every digit is used at least once).at n=26A082807
• Palindromic primes which are a member of a twin prime pair.at n=23A083840
• Palindromic primes p such that p+2 is also a prime: members of A083840 which are the smaller member of a twin prime pair.at n=11A083841
• Smallest palindromic prime containing exactly n 2's.at n=2A083973
• Smallest palindromic prime containing the digit string of n.at n=22A083982