Wednesday, August 28, 2013

3221

3221 is a prime number.

3221 has a representation as a sum of two squares: 3221 = 142 + 552.

3221 is the hypotenuse of a primitive Pythagorean triple: 32212 = 15402 + 28292.

3221 is a divisor of 115 - 1.

3221 is the sum of four positive fifth powers (A003349): 3221 = 55 + 25 + 25 + 25.

3221 is a number n such that googol - n is prime (A108251).


Source: On-Line Encyclopedia of Integer Sequences

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