53

This number is a prime.

Just showing those entries submitted by 'Silva': (Click here to show all)

The first bisexual prime, i.e., sharing two pairs of sexy primes. [Silva]

53 is the average of the 5 two-digit primes with the end-digit 7. Note that the the reversal of 53 is the product of 5 an 7. [Silva]

53 is the twinnest prime, i.e., formed from a pair of twin primes and whose reversal is the product of another pair of twin primes. [Silva]