521056117052 has 12 divisors (see below), whose sum is σ = 912395216040. Its totient is φ = 260371769616.

The previous prime is 521056117037. The next prime is 521056117063. The reversal of 521056117052 is 250711650125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39064727 + ... + 39078062.

It is an arithmetic number, because the mean of its divisors is an integer number (76032934670).

Almost surely, 2^521056117052 is an apocalyptic number.

It is an amenable number.

521056117052 is a deficient number, since it is larger than the sum of its proper divisors (391339098988).

521056117052 is a wasteful number, since it uses less digits than its factorization.

521056117052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78144460 (or 78144458 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 35.

Adding to 521056117052 its reverse (250711650125), we get a palindrome (771767767177).

The spelling of 521056117052 in words is "five hundred twenty-one billion, fifty-six million, one hundred seventeen thousand, fifty-two".