521530852 has 12 divisors (see below), whose sum is σ = 913725820. Its totient is φ = 260466336.

The previous prime is 521530831. The next prime is 521530853. The reversal of 521530852 is 258035125.

It can be written as a sum of positive squares in 2 ways, for example, as 380016036 + 141514816 = 19494^2 + 11896^2 .

It is not an unprimeable number, because it can be changed into a prime (521530853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70827 + ... + 77842.

Almost surely, 2^521530852 is an apocalyptic number.

It is an amenable number.

521530852 is a deficient number, since it is larger than the sum of its proper divisors (392194968).

521530852 is a wasteful number, since it uses less digits than its factorization.

521530852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149550 (or 149548 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 521530852 is about 22837.0499846193. The cubic root of 521530852 is about 804.9334986151.

Adding to 521530852 its reverse (258035125), we get a palindrome (779565977).

The spelling of 521530852 in words is "five hundred twenty-one million, five hundred thirty thousand, eight hundred fifty-two".