231994922113 has 4 divisors (see below), whose sum is σ = 232990608708. Its totient is φ = 230999235520.

The previous prime is 231994922077. The next prime is 231994922119. The reversal of 231994922113 is 311229499132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 64458608769 + 167536313344 = 253887^2 + 409312^2 .

It is a cyclic number.

It is not a de Polignac number, because 231994922113 - 2⁹ = 231994921601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231994922119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497842948 + ... + 497843413.

It is an arithmetic number, because the mean of its divisors is an integer number (58247652177).

Almost surely, 2^231994922113 is an apocalyptic number.

It is an amenable number.

231994922113 is a deficient number, since it is larger than the sum of its proper divisors (995686595).

231994922113 is an equidigital number, since it uses as much as digits as its factorization.

231994922113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995686594.

The product of its digits is 209952, while the sum is 46.

The spelling of 231994922113 in words is "two hundred thirty-one billion, nine hundred ninety-four million, nine hundred twenty-two thousand, one hundred thirteen".