521144216112 has 40 divisors (see below), whose sum is σ = 1449849936304. Its totient is φ = 160352066304.

The previous prime is 521144216111. The next prime is 521144216143. The reversal of 521144216112 is 211612441125.

It is a self number, because there is not a number n which added to its sum of digits gives 521144216112.

It is not an unprimeable number, because it can be changed into a prime (521144216111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417582883 + ... + 417584130.

Almost surely, 2^521144216112 is an apocalyptic number.

521144216112 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

521144216112 is an abundant number, since it is smaller than the sum of its proper divisors (928705720192).

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

521144216112 is a wasteful number, since it uses less digits than its factorization.

521144216112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835167037 (or 835167031 counting only the distinct ones).

The product of its digits is 3840, while the sum is 30.

Adding to 521144216112 its reverse (211612441125), we get a palindrome (732756657237).

The spelling of 521144216112 in words is "five hundred twenty-one billion, one hundred forty-four million, two hundred sixteen thousand, one hundred twelve".