231881370238 has 24 divisors (see below), whose sum is σ = 422201043792. Its totient is φ = 95056958304.

The previous prime is 231881370209. The next prime is 231881370241. The reversal of 231881370238 is 832073188132.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51435495 + ... + 51440002.

It is an arithmetic number, because the mean of its divisors is an integer number (17591710158).

Almost surely, 2^231881370238 is an apocalyptic number.

231881370238 is a deficient number, since it is larger than the sum of its proper divisors (190319673554).

231881370238 is a wasteful number, since it uses less digits than its factorization.

231881370238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102875536 (or 102875529 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 231881370238 in words is "two hundred thirty-one billion, eight hundred eighty-one million, three hundred seventy thousand, two hundred thirty-eight".