231320320404 has 48 divisors (see below), whose sum is σ = 544102019328. Its totient is φ = 76485547008.

The previous prime is 231320320397. The next prime is 231320320411. The reversal of 231320320404 is 404023023132.

It is an interprime number because it is at equal distance from previous prime (231320320397) and next prime (231320320411).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2128572 + ... + 2234604.

It is an arithmetic number, because the mean of its divisors is an integer number (11335458736).

Almost surely, 2^231320320404 is an apocalyptic number.

It is an amenable number.

231320320404 is an abundant number, since it is smaller than the sum of its proper divisors (312781698924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231320320404 is a wasteful number, since it uses less digits than its factorization.

231320320404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107504 (or 107502 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 231320320404 its reverse (404023023132), we get a palindrome (635343343536).

The spelling of 231320320404 in words is "two hundred thirty-one billion, three hundred twenty million, three hundred twenty thousand, four hundred four".