521536505212 has 12 divisors (see below), whose sum is σ = 960725141320. Its totient is φ = 247043607696.

The previous prime is 521536505137. The next prime is 521536505213. The reversal of 521536505212 is 212505635125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521536505213) 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, 3431161143 + ... + 3431161294.

Almost surely, 2^521536505212 is an apocalyptic number.

It is an amenable number.

521536505212 is a deficient number, since it is larger than the sum of its proper divisors (439188636108).

521536505212 is a wasteful number, since it uses less digits than its factorization.

521536505212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6862322460 (or 6862322458 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 37.

The spelling of 521536505212 in words is "five hundred twenty-one billion, five hundred thirty-six million, five hundred five thousand, two hundred twelve".