521314426216 has 16 divisors (see below), whose sum is σ = 987541504740. Its totient is φ = 257970024960.

The previous prime is 521314426169. The next prime is 521314426229. The reversal of 521314426216 is 612624413125.

It can be written as a sum of positive squares in 2 ways, for example, as 516831588100 + 4482838116 = 718910^2 + 66954^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335897695 + ... + 335899246.

Almost surely, 2^521314426216 is an apocalyptic number.

It is an amenable number.

521314426216 is a deficient number, since it is larger than the sum of its proper divisors (466227078524).

521314426216 is a wasteful number, since it uses less digits than its factorization.

521314426216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671797044 (or 671797040 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The spelling of 521314426216 in words is "five hundred twenty-one billion, three hundred fourteen million, four hundred twenty-six thousand, two hundred sixteen".