231871610805 has 16 divisors (see below), whose sum is σ = 373915797504. Its totient is φ = 122691119040.

The previous prime is 231871610783. The next prime is 231871610813. The reversal of 231871610805 is 508016178132.

It is not a de Polignac number, because 231871610805 - 2⁸ = 231871610549 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60856786 + ... + 60860595.

It is an arithmetic number, because the mean of its divisors is an integer number (23369737344).

Almost surely, 2^231871610805 is an apocalyptic number.

It is an amenable number.

231871610805 is a deficient number, since it is larger than the sum of its proper divisors (142044186699).

231871610805 is a wasteful number, since it uses less digits than its factorization.

231871610805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121717516.

The product of its (nonzero) digits is 80640, while the sum is 42.

Adding to 231871610805 its reverse (508016178132), we get a palindrome (739887788937).

The spelling of 231871610805 in words is "two hundred thirty-one billion, eight hundred seventy-one million, six hundred ten thousand, eight hundred five".