521305052 has 48 divisors (see below), whose sum is σ = 997785600. Its totient is φ = 237401280.

The previous prime is 521305049. The next prime is 521305079. The reversal of 521305052 is 250503125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 406949 + ... + 408227.

It is an arithmetic number, because the mean of its divisors is an integer number (20787200).

Almost surely, 2^521305052 is an apocalyptic number.

It is an amenable number.

521305052 is a deficient number, since it is larger than the sum of its proper divisors (476480548).

521305052 is a wasteful number, since it uses less digits than its factorization.

521305052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506 (or 1504 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 521305052 is about 22832.1057285569. The cubic root of 521305052 is about 804.8173148712.

Adding to 521305052 its reverse (250503125), we get a palindrome (771808177).

The spelling of 521305052 in words is "five hundred twenty-one million, three hundred five thousand, fifty-two".