75557

Properties

Appears in sequences

• Primes that contain digits 5 and 7 only.at n=9A020467
• Palindromic terms from A019546.at n=17A045336
• Palindromic primes containing at least one pair of consecutive equal digits.at n=9A050786
• Palindromic primes whose sum of squared digits is also prime.at n=26A052035
• Palindromic primes using only two distinct digits and only the exterior digit is different.at n=20A056728
• Palindromic primes with just two distinct digits.at n=28A056730
• Palindromic primes with just two distinct prime digits.at n=9A058375
• Primes which are a sandwich of numbers made of only one digit between two 7's.at n=5A068688
• Primes with only prime digits and whose initial, all intermediate and final iterated sums of digits are primes.at n=33A070029
• Palindromic primes = 1 mod 4.at n=38A081220
• Palindromic primes with middle digit 5.at n=13A082441
• Larger of a pair of consecutive primes having only prime digits.at n=33A082756
• 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=29A082770
• Smallest palindromic prime using only prime digits (2,3,5,7) and having a sum of digits = prime(n), or 0 if no such number exists.at n=9A083183
• Palindromic primes with nonincreasing digits up to the middle and then nondecreasing.at n=16A084837
• Palindromic primes that yield a prime when sandwiched between two 1's. (Prefixing and suffixing a 1 on both sides yields another palindromic prime.)at n=12A088269
• Palindromic primes using at most two distinct digits.at n=33A088562
• Palindromic primes with property that sum of digits is prime and number of prime digits is prime.at n=23A093808
• Duplicate of A088269.at n=12A103993
• Palindromic primes in which all internal digits are 5.at n=4A108842