523203664 has 10 divisors (see below), whose sum is σ = 1013707130. Its totient is φ = 261601824.

The previous prime is 523203631. The next prime is 523203689. The reversal of 523203664 is 466302325.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 368947264 + 154256400 = 19208^2 + 12420^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16350099 + ... + 16350130.

It is an arithmetic number, because the mean of its divisors is an integer number (101370713).

Almost surely, 2^523203664 is an apocalyptic number.

It is an amenable number.

523203664 is a deficient number, since it is larger than the sum of its proper divisors (490503466).

523203664 is a wasteful number, since it uses less digits than its factorization.

523203664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32700237 (or 32700231 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 523203664 is about 22873.6456211073. The cubic root of 523203664 is about 805.7931891034.

Adding to 523203664 its reverse (466302325), we get a palindrome (989505989).

The spelling of 523203664 in words is "five hundred twenty-three million, two hundred three thousand, six hundred sixty-four".