521223535242 has 24 divisors (see below), whose sum is σ = 1130466546144. Its totient is φ = 173564426664.

The previous prime is 521223535229. The next prime is 521223535243. The reversal of 521223535242 is 242535322125.

It is a happy number.

521223535242 is a `hidden beast` number, since 5 + 2 + 122 + 3 + 5 + 3 + 524 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 521223535197 and 521223535206.

It is not an unprimeable number, because it can be changed into a prime (521223535243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14711128 + ... + 14746515.

It is an arithmetic number, because the mean of its divisors is an integer number (47102772756).

Almost surely, 2^521223535242 is an apocalyptic number.

521223535242 is an abundant number, since it is smaller than the sum of its proper divisors (609243010902).

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

521223535242 is a wasteful number, since it uses less digits than its factorization.

521223535242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29458634 (or 29458631 counting only the distinct ones).

The product of its digits is 144000, while the sum is 36.

Adding to 521223535242 its reverse (242535322125), we get a palindrome (763758857367).

The spelling of 521223535242 in words is "five hundred twenty-one billion, two hundred twenty-three million, five hundred thirty-five thousand, two hundred forty-two".