521523442112 has 112 divisors (see below), whose sum is σ = 1102463550720. Its totient is φ = 243928399872.

The previous prime is 521523442087. The next prime is 521523442151. The reversal of 521523442112 is 211244325125.

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 196281488 + ... + 196284144.

It is an arithmetic number, because the mean of its divisors is an integer number (9843424560).

Almost surely, 2^521523442112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521523442112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (551231775360).

521523442112 is an abundant number, since it is smaller than the sum of its proper divisors (580940108608).

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

521523442112 is a wasteful number, since it uses less digits than its factorization.

521523442112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3718 (or 3708 counting only the distinct ones).

The product of its digits is 19200, while the sum is 32.

Adding to 521523442112 its reverse (211244325125), we get a palindrome (732767767237).

The spelling of 521523442112 in words is "five hundred twenty-one billion, five hundred twenty-three million, four hundred forty-two thousand, one hundred twelve".