521429568 has 56 divisors (see below), whose sum is σ = 1505041440. Its totient is φ = 158008320.

The previous prime is 521429549. The next prime is 521429591. The reversal of 521429568 is 865924125.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121333 + ... + 125556.

It is an arithmetic number, because the mean of its divisors is an integer number (26875740).

Almost surely, 2^521429568 is an apocalyptic number.

It is an amenable number.

521429568 is an abundant number, since it is smaller than the sum of its proper divisors (983611872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521429568 is a wasteful number, since it uses less digits than its factorization.

521429568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246915 (or 246905 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 521429568 is about 22834.8323400896. The cubic root of 521429568 is about 804.8813878196.

The spelling of 521429568 in words is "five hundred twenty-one million, four hundred twenty-nine thousand, five hundred sixty-eight".