9222229

Properties

Appears in sequences

• Primes that contain digits 2 and 9 only.at n=17A020460
• Primes containing only two distinct digits whose sum of digits is 28, the second perfect number.at n=12A048518
• Palindromic primes using only two distinct digits and only the exterior digit is different.at n=30A056728
• Primes in which a string of 2's is sandwiched between two 9's.at n=1A068651
• Primes which are a sandwich of numbers made of only one decimal digit between two 9's.at n=2A068689
• Palindromic primes in which all internal digits are 2.at n=4A108846
• Largest n-digit prime with the maximum number of digits equal to 2.at n=6A178000
• Primes of the form XYYYYYX, where Y is a single digit.at n=6A214291
• Prime numbersat n=616309