157

157 is a prime number.

157 is the smallest prime number of the form 2^p + p³, where p is prime.

157 is the smallest three-digit prime that produces five other primes by changing only its first digit: 257, 457, 557, 757, and 857.

157² and (157 + 1)² use the same digits: 24649 and 24964.

The most common type of Escherichia coli infection that causes illness in people is E. coli 0157.


Source: Prime Curios!
Image: CDC/Peggy S. Hayes