231323232321 has 8 divisors (see below), whose sum is σ = 342701084960. Its totient is φ = 154215488196.

The previous prime is 231323232313. The next prime is 231323232377. The reversal of 231323232321 is 123232323132.

231323232321 is a `hidden beast` number, since 2 + 3 + 13 + 2 + 323 + 2 + 321 = 666.

231323232321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231323232321 - 2³ = 231323232313 is a prime.

It is a super-2 number, since 2×231323232321² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 8567527123 = 231323232321 / (2 + 3 + 1 + 3 + 2 + 3 + 2 + 3 + 2 + 3 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231323232311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4283763535 + ... + 4283763588.

It is an arithmetic number, because the mean of its divisors is an integer number (42837635620).

Almost surely, 2^231323232321 is an apocalyptic number.

It is an amenable number.

231323232321 is a deficient number, since it is larger than the sum of its proper divisors (111377852639).

231323232321 is an equidigital number, since it uses as much as digits as its factorization.

231323232321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8567527132 (or 8567527126 counting only the distinct ones).

The product of its digits is 7776, while the sum is 27.

Adding to 231323232321 its reverse (123232323132), we get a palindrome (354555555453).

The spelling of 231323232321 in words is "two hundred thirty-one billion, three hundred twenty-three million, two hundred thirty-two thousand, three hundred twenty-one".