231021323 has 16 divisors (see below), whose sum is σ = 262483200. Its totient is φ = 201566880.

The previous prime is 231021317. The next prime is 231021353. The reversal of 231021323 is 323120132.

231021323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231021323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231021353) 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, 152138 + ... + 153648.

It is an arithmetic number, because the mean of its divisors is an integer number (16405200).

Almost surely, 2^231021323 is an apocalyptic number.

231021323 is a deficient number, since it is larger than the sum of its proper divisors (31461877).

231021323 is a wasteful number, since it uses less digits than its factorization.

231021323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 231021323 is about 15199.3856125832. The cubic root of 231021323 is about 613.5981226786.

Adding to 231021323 its reverse (323120132), we get a palindrome (554141455).

The spelling of 231021323 in words is "two hundred thirty-one million, twenty-one thousand, three hundred twenty-three".