231320204321 has 8 divisors (see below), whose sum is σ = 239202422784. Its totient is φ = 223568270640.

The previous prime is 231320204309. The next prime is 231320204351. The reversal of 231320204321 is 123402023132.

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-231320204321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231320204351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32567585 + ... + 32574686.

It is an arithmetic number, because the mean of its divisors is an integer number (29900302848).

Almost surely, 2^231320204321 is an apocalyptic number.

It is an amenable number.

231320204321 is a deficient number, since it is larger than the sum of its proper divisors (7882218463).

231320204321 is an equidigital number, since it uses as much as digits as its factorization.

231320204321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65142391.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 231320204321 its reverse (123402023132), we get a palindrome (354722227453).

The spelling of 231320204321 in words is "two hundred thirty-one billion, three hundred twenty million, two hundred four thousand, three hundred twenty-one".