157 is a prime number.
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.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjxnp5ge1B2QKO1F16_ebP-83KTtA61oOJoiB74_SWld9iTmjSxxkwF9DVNs8kVZG2sOjxvLFJmm1u9SLUocPfl8Ca5afRaB2pwJmzSdCIJN43gOYXIl-RTus4Ci0ZRotqc1gzRnoAcGWM/s200/n0157.jpg)
The most common type of Escherichia coli infection that causes illness in people is E. coli 0157.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg5C8qCv7YJ9J4A7odtFoibNIabukOcQ5lEqoSUdUhSGD18KxyWIjB-BQABvtHcCXvseCrwhNqaxJeWepsPDeWgMYMrB-XxBN4aceuTweQJk7PNgzVmAyDEJgQycgsutyBVhXyze8JCXJk/s320/e.coli157.jpg)
Source: Prime Curios!
Image: CDC/Peggy S. Hayes
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