521254424205516 has 12 divisors (see below), whose sum is σ = 1216260323146232. Its totient is φ = 173751474735168.

The previous prime is 521254424205499. The next prime is 521254424205533. The reversal of 521254424205516 is 615502424452125.

It is an interprime number because it is at equal distance from previous prime (521254424205499) and next prime (521254424205533).

It is a tau number, because it is divible by the number of its divisors (12).

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, 21718934341885 + ... + 21718934341908.

Almost surely, 2^{521254424205516} is an apocalyptic number.

It is an amenable number.

521254424205516 is an abundant number, since it is smaller than the sum of its proper divisors (695005898940716).

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

521254424205516 is a wasteful number, since it uses less digits than its factorization.

521254424205516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43437868683800 (or 43437868683798 counting only the distinct ones).

The product of its (nonzero) digits is 3840000, while the sum is 48.

The spelling of 521254424205516 in words is "five hundred twenty-one trillion, two hundred fifty-four billion, four hundred twenty-four million, two hundred five thousand, five hundred sixteen".