5557

5557 is a prime number.

5557 is palindromic in base 2: 1010110110101.

5557 has a representation as the sum of two squares: 5557 = 9² + 74².

5557 is the hypotenuse of a primitive Pythagorean triple: 5557² = 1332² + 5395².

In summing primes, 2 + 3 + 5 + 7 + 11 + . . . + 3833 = 3847 + 3851 + . . . + 5557.


NGC 5557 is a galaxy in the constellation Bootes.

Source: Prime Curios!