522312520 has 64 divisors (see below), whose sum is σ = 1240272000. Its totient is φ = 197564928.

The previous prime is 522312499. The next prime is 522312523. The reversal of 522312520 is 25213225.

It is a junction number, because it is equal to n+sod(n) for n = 522312491 and 522312500.

It is not an unprimeable number, because it can be changed into a prime (522312523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78691 + ... + 85069.

It is an arithmetic number, because the mean of its divisors is an integer number (19379250).

Almost surely, 2^522312520 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 522312520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (620136000).

522312520 is an abundant number, since it is smaller than the sum of its proper divisors (717959480).

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

522312520 is a wasteful number, since it uses less digits than its factorization.

522312520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6502 (or 6498 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 522312520 is about 22854.1576086278. The cubic root of 522312520 is about 805.3354413920.

Adding to 522312520 its reverse (25213225), we get a palindrome (547525745).

The spelling of 522312520 in words is "five hundred twenty-two million, three hundred twelve thousand, five hundred twenty".