523323521 has 16 divisors (see below), whose sum is σ = 616896000. Its totient is φ = 434644800.

The previous prime is 523323509. The next prime is 523323551. The reversal of 523323521 is 125323325.

It is a cyclic number.

It is not a de Polignac number, because 523323521 - 2⁶ = 523323457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (523323551) 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, 25355 + ... + 41103.

It is an arithmetic number, because the mean of its divisors is an integer number (38556000).

Almost surely, 2^523323521 is an apocalyptic number.

It is an amenable number.

523323521 is a deficient number, since it is larger than the sum of its proper divisors (93572479).

523323521 is a wasteful number, since it uses less digits than its factorization.

523323521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15904.

The product of its digits is 5400, while the sum is 26.

The square root of 523323521 is about 22876.2654513362. The cubic root of 523323521 is about 805.8547155458.

Adding to 523323521 its reverse (125323325), we get a palindrome (648646846).

The spelling of 523323521 in words is "five hundred twenty-three million, three hundred twenty-three thousand, five hundred twenty-one".