251 is the smallest number that is the sum of three different cubes in two ways: 251 = 13 + 53 + 53 = 23 + 33 + 63.
251 can be expressed using the first three primes: 251 = 23 + 33.
251 is a divisor of 205 - 1.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhsOHtK2Trd10tM5BuSORg4rO4gg5q34m5lwXTZc2yGP6HWeOfN39yHT6E8-Bckf3o8AAHBd5AaypkHw0LJ73Axl9hJoNf56PfANUBO8p9E8YRE00zURBG4-4hG79N46NpT87JQCIRVYu0/s400/n0251.jpg)
Telephone area code 251 covers southwestern Alabama.
Source: Prime Curios!
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhsOHtK2Trd10tM5BuSORg4rO4gg5q34m5lwXTZc2yGP6HWeOfN39yHT6E8-Bckf3o8AAHBd5AaypkHw0LJ73Axl9hJoNf56PfANUBO8p9E8YRE00zURBG4-4hG79N46NpT87JQCIRVYu0/s400/n0251.jpg)
Telephone area code 251 covers southwestern Alabama.
Source: Prime Curios!
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