231944381959 has 4 divisors (see below), whose sum is σ = 231984043200. Its totient is φ = 231904720720.

The previous prime is 231944381917. The next prime is 231944381989. The reversal of 231944381959 is 959183449132.

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

It is a cyclic number.

It is not a de Polignac number, because 231944381959 - 2⁹ = 231944381447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231944381989) 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, 19821847 + ... + 19833544.

It is an arithmetic number, because the mean of its divisors is an integer number (57996010800).

Almost surely, 2^231944381959 is an apocalyptic number.

231944381959 is a deficient number, since it is larger than the sum of its proper divisors (39661241).

231944381959 is an equidigital number, since it uses as much as digits as its factorization.

231944381959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39661240.

The product of its digits is 8398080, while the sum is 58.

The spelling of 231944381959 in words is "two hundred thirty-one billion, nine hundred forty-four million, three hundred eighty-one thousand, nine hundred fifty-nine".