231317381879 has 32 divisors (see below), whose sum is σ = 247390101504. Its totient is φ = 215822027520.

The previous prime is 231317381861. The next prime is 231317381909. The reversal of 231317381879 is 978183713132.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231317381879 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231317381879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231317381809) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68577437 + ... + 68580809.

It is an arithmetic number, because the mean of its divisors is an integer number (7730940672).

Almost surely, 2^231317381879 is an apocalyptic number.

231317381879 is a deficient number, since it is larger than the sum of its proper divisors (16072719625).

231317381879 is a wasteful number, since it uses less digits than its factorization.

231317381879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3887.

The product of its digits is 1524096, while the sum is 53.

The spelling of 231317381879 in words is "two hundred thirty-one billion, three hundred seventeen million, three hundred eighty-one thousand, eight hundred seventy-nine".