231131444131 has 16 divisors (see below), whose sum is σ = 278586639360. Its totient is φ = 187325386560.

The previous prime is 231131444123. The next prime is 231131444179. The reversal of 231131444131 is 131444131132.

231131444131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 231131444131 - 2³ = 231131444123 is a prime.

It is a super-2 number, since 2×231131444131² (a number of 24 digits) contains 22 as substring.

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 231131444131.

It is not an unprimeable number, because it can be changed into a prime (231131444101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1598491 + ... + 1737076.

It is an arithmetic number, because the mean of its divisors is an integer number (17411664960).

Almost surely, 2^231131444131 is an apocalyptic number.

231131444131 is a deficient number, since it is larger than the sum of its proper divisors (47455195229).

231131444131 is a wasteful number, since it uses less digits than its factorization.

231131444131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3336114.

The product of its digits is 3456, while the sum is 28.

Adding to 231131444131 its reverse (131444131132), we get a palindrome (362575575263).

The spelling of 231131444131 in words is "two hundred thirty-one billion, one hundred thirty-one million, four hundred forty-four thousand, one hundred thirty-one".