231344435321 has 4 divisors (see below), whose sum is σ = 236724538512. Its totient is φ = 225964332132.

The previous prime is 231344435317. The next prime is 231344435339. The reversal of 231344435321 is 123534443132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231344435321 - 2² = 231344435317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231344435341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2690051531 + ... + 2690051616.

It is an arithmetic number, because the mean of its divisors is an integer number (59181134628).

Almost surely, 2^231344435321 is an apocalyptic number.

It is an amenable number.

231344435321 is a deficient number, since it is larger than the sum of its proper divisors (5380103191).

231344435321 is an equidigital number, since it uses as much as digits as its factorization.

231344435321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5380103190.

The product of its digits is 103680, while the sum is 35.

Adding to 231344435321 its reverse (123534443132), we get a palindrome (354878878453).

The spelling of 231344435321 in words is "two hundred thirty-one billion, three hundred forty-four million, four hundred thirty-five thousand, three hundred twenty-one".