231317381878 has 16 divisors (see below), whose sum is σ = 378820048320. Its totient is φ = 105060737800.

The previous prime is 231317381861. The next prime is 231317381909. The reversal of 231317381878 is 878183713132.

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 7 ways as a sum of consecutive naturals, for example, 4148008 + ... + 4203403.

It is an arithmetic number, because the mean of its divisors is an integer number (23676253020).

Almost surely, 2^231317381878 is an apocalyptic number.

231317381878 is a deficient number, since it is larger than the sum of its proper divisors (147502666442).

231317381878 is a wasteful number, since it uses less digits than its factorization.

231317381878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8352683.

The product of its digits is 1354752, while the sum is 52.

The spelling of 231317381878 in words is "two hundred thirty-one billion, three hundred seventeen million, three hundred eighty-one thousand, eight hundred seventy-eight".