523016321 has 8 divisors (see below), whose sum is σ = 531948384. Its totient is φ = 514159360.

The previous prime is 523016309. The next prime is 523016327. The reversal of 523016321 is 123610325.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-523016321 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523016327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4640 + ... + 32673.

It is an arithmetic number, because the mean of its divisors is an integer number (66493548).

Almost surely, 2^523016321 is an apocalyptic number.

It is an amenable number.

523016321 is a deficient number, since it is larger than the sum of its proper divisors (8932063).

523016321 is a wasteful number, since it uses less digits than its factorization.

523016321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37551.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 523016321 is about 22869.5500830252. The cubic root of 523016321 is about 805.6970011079.

Adding to 523016321 its reverse (123610325), we get a palindrome (646626646).

The spelling of 523016321 in words is "five hundred twenty-three million, sixteen thousand, three hundred twenty-one".