523320212 has 12 divisors (see below), whose sum is σ = 916790196. Its totient is φ = 261380160.

The previous prime is 523320199. The next prime is 523320221. The reversal of 523320212 is 212023325.

It can be written as a sum of positive squares in 2 ways, for example, as 322417936 + 200902276 = 17956^2 + 14174^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65753 + ... + 73280.

It is an arithmetic number, because the mean of its divisors is an integer number (76399183).

Almost surely, 2^523320212 is an apocalyptic number.

It is an amenable number.

523320212 is a deficient number, since it is larger than the sum of its proper divisors (393469984).

523320212 is a wasteful number, since it uses less digits than its factorization.

523320212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139978 (or 139976 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 523320212 is about 22876.1931273540. The cubic root of 523320212 is about 805.8530170561.

Adding to 523320212 its reverse (212023325), we get a palindrome (735343537).

The spelling of 523320212 in words is "five hundred twenty-three million, three hundred twenty thousand, two hundred twelve".