231044440131 has 12 divisors (see below), whose sum is σ = 336849839352. Its totient is φ = 152590096896.

The previous prime is 231044440117. The next prime is 231044440141. The reversal of 231044440131 is 131044440132.

It is not a de Polignac number, because 231044440131 - 2³⁴ = 213864570947 is a prime.

It is a super-2 number, since 2×231044440131² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231044440095 and 231044440104.

It is not an unprimeable number, because it can be changed into a prime (231044440141) 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 11 ways as a sum of consecutive naturals, for example, 119959806 + ... + 119961731.

It is an arithmetic number, because the mean of its divisors is an integer number (28070819946).

Almost surely, 2^231044440131 is an apocalyptic number.

231044440131 is a deficient number, since it is larger than the sum of its proper divisors (105805399221).

231044440131 is a wasteful number, since it uses less digits than its factorization.

231044440131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239921650 (or 239921647 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 231044440131 its reverse (131044440132), we get a palindrome (362088880263).

Subtracting from 231044440131 its reverse (131044440132), we obtain a palindrome (99999999999).

The spelling of 231044440131 in words is "two hundred thirty-one billion, forty-four million, four hundred forty thousand, one hundred thirty-one".