523011321 has 24 divisors (see below), whose sum is σ = 871316160. Its totient is φ = 296117856.

The previous prime is 523011319. The next prime is 523011331. The reversal of 523011321 is 123110325.

It is not a de Polignac number, because 523011321 - 2¹ = 523011319 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 523011294 and 523011303.

It is not an unprimeable number, because it can be changed into a prime (523011331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31215 + ... + 44948.

It is an arithmetic number, because the mean of its divisors is an integer number (36304840).

Almost surely, 2^523011321 is an apocalyptic number.

It is an amenable number.

523011321 is a deficient number, since it is larger than the sum of its proper divisors (348304839).

523011321 is a wasteful number, since it uses less digits than its factorization.

523011321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76285 (or 76282 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 523011321 is about 22869.4407671023. The cubic root of 523011321 is about 805.6944336305.

Adding to 523011321 its reverse (123110325), we get a palindrome (646121646).

The spelling of 523011321 in words is "five hundred twenty-three million, eleven thousand, three hundred twenty-one".