231440044123 has 4 divisors (see below), whose sum is σ = 232614866880. Its totient is φ = 230265221368.

The previous prime is 231440044111. The next prime is 231440044151. The reversal of 231440044123 is 321440044132.

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 231440044123 - 2¹⁷ = 231439913051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231440044091 and 231440044100.

It is not an unprimeable number, because it can be changed into a prime (231440044153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587411083 + ... + 587411476.

It is an arithmetic number, because the mean of its divisors is an integer number (58153716720).

Almost surely, 2^231440044123 is an apocalyptic number.

231440044123 is a deficient number, since it is larger than the sum of its proper divisors (1174822757).

231440044123 is a wasteful number, since it uses less digits than its factorization.

231440044123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174822756.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 231440044123 its reverse (321440044132), we get a palindrome (552880088255).

Subtracting 231440044123 from its reverse (321440044132), we obtain a palindrome (90000000009).

The spelling of 231440044123 in words is "two hundred thirty-one billion, four hundred forty million, forty-four thousand, one hundred twenty-three".