521974968 has 32 divisors (see below), whose sum is σ = 1305839760. Its totient is φ = 173871360.

The previous prime is 521974963. The next prime is 521974991. The reversal of 521974968 is 869479125.

It is a self number, because there is not a number n which added to its sum of digits gives 521974968.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521974961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32196 + ... + 45612.

Almost surely, 2^521974968 is an apocalyptic number.

It is an amenable number.

521974968 is an abundant number, since it is smaller than the sum of its proper divisors (783864792).

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

521974968 is a wasteful number, since it uses less digits than its factorization.

521974968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15047 (or 15043 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 51.

The square root of 521974968 is about 22846.7715005862. The cubic root of 521974968 is about 805.1619174574.

The spelling of 521974968 in words is "five hundred twenty-one million, nine hundred seventy-four thousand, nine hundred sixty-eight".