231631423605311 has 4 divisors (see below), whose sum is σ = 231631456777800. Its totient is φ = 231631390432824.

The previous prime is 231631423605299. The next prime is 231631423605343. The reversal of 231631423605311 is 113506324136132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231631423605311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231631423605391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1596881 + ... + 21582698.

It is an arithmetic number, because the mean of its divisors is an integer number (57907864194450).

Almost surely, 2^{231631423605311} is an apocalyptic number.

231631423605311 is a deficient number, since it is larger than the sum of its proper divisors (33172489).

231631423605311 is an equidigital number, since it uses as much as digits as its factorization.

231631423605311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33172488.

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 231631423605311 in words is "two hundred thirty-one trillion, six hundred thirty-one billion, four hundred twenty-three million, six hundred five thousand, three hundred eleven".