521696732 has 12 divisors (see below), whose sum is σ = 916220256. Its totient is φ = 259919520.

The previous prime is 521696677. The next prime is 521696759. The reversal of 521696732 is 237696125.

It is a self number, because there is not a number n which added to its sum of digits gives 521696732.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230948 + ... + 233195.

It is an arithmetic number, because the mean of its divisors is an integer number (76351688).

Almost surely, 2^521696732 is an apocalyptic number.

It is an amenable number.

521696732 is a deficient number, since it is larger than the sum of its proper divisors (394523524).

521696732 is a wasteful number, since it uses less digits than its factorization.

521696732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464428 (or 464426 counting only the distinct ones).

The product of its digits is 136080, while the sum is 41.

The square root of 521696732 is about 22840.6815134750. The cubic root of 521696732 is about 805.0188295944.

The spelling of 521696732 in words is "five hundred twenty-one million, six hundred ninety-six thousand, seven hundred thirty-two".