521542423332112 has 80 divisors (see below), whose sum is σ = 1243731002926720. Its totient is φ = 206315696388096.

The previous prime is 521542423332089. The next prime is 521542423332169. The reversal of 521542423332112 is 211233324245125.

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, 26664088 + ... + 41881480.

It is an arithmetic number, because the mean of its divisors is an integer number (15546637536584).

Almost surely, 2^{521542423332112} is an apocalyptic number.

521542423332112 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

521542423332112 is an abundant number, since it is smaller than the sum of its proper divisors (722188579594608).

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

521542423332112 is a wasteful number, since it uses less digits than its factorization.

521542423332112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15240960 (or 15240954 counting only the distinct ones).

The product of its digits is 345600, while the sum is 40.

Adding to 521542423332112 its reverse (211233324245125), we get a palindrome (732775747577237).

The spelling of 521542423332112 in words is "five hundred twenty-one trillion, five hundred forty-two billion, four hundred twenty-three million, three hundred thirty-two thousand, one hundred twelve".