521535996 has 60 divisors (see below), whose sum is σ = 1443613248. Its totient is φ = 163617408.

The previous prime is 521535961. The next prime is 521536009. The reversal of 521535996 is 699535125.

521535996 is a `hidden beast` number, since 5 + 2 + 1 + 53 + 599 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 41836 + ... + 52851.

Almost surely, 2^521535996 is an apocalyptic number.

It is an amenable number.

521535996 is an abundant number, since it is smaller than the sum of its proper divisors (922077252).

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

521535996 is a wasteful number, since it uses less digits than its factorization.

521535996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94720 (or 94709 counting only the distinct ones).

The product of its digits is 364500, while the sum is 45.

The square root of 521535996 is about 22837.1626083452. The cubic root of 521535996 is about 804.9361450321.

The spelling of 521535996 in words is "five hundred twenty-one million, five hundred thirty-five thousand, nine hundred ninety-six".