522523420 has 24 divisors (see below), whose sum is σ = 1104572448. Its totient is φ = 207624000.

The previous prime is 522523409. The next prime is 522523439. The reversal of 522523420 is 24325225.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83491 + ... + 89530.

It is an arithmetic number, because the mean of its divisors is an integer number (46023852).

Almost surely, 2^522523420 is an apocalyptic number.

It is an amenable number.

522523420 is an abundant number, since it is smaller than the sum of its proper divisors (582049028).

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

522523420 is a wasteful number, since it uses less digits than its factorization.

522523420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173181 (or 173179 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 522523420 is about 22858.7711830711. The cubic root of 522523420 is about 805.4438199222.

Adding to 522523420 its reverse (24325225), we get a palindrome (546848645).

The spelling of 522523420 in words is "five hundred twenty-two million, five hundred twenty-three thousand, four hundred twenty".