131444443438 has 96 divisors (see below), whose sum is σ = 265392547200. Its totient is φ = 48145406400.

The previous prime is 131444443399. The next prime is 131444443439. The reversal of 131444443438 is 834344444131.

It is a junction number, because it is equal to n+sod(n) for n = 131444443394 and 131444443403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131444443439) 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 47 ways as a sum of consecutive naturals, for example, 2658648 + ... + 2707636.

It is an arithmetic number, because the mean of its divisors is an integer number (2764505700).

Almost surely, 2^131444443438 is an apocalyptic number.

131444443438 is an abundant number, since it is smaller than the sum of its proper divisors (133948103762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131444443438 is a wasteful number, since it uses less digits than its factorization.

131444443438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49166 (or 49159 counting only the distinct ones).

The product of its digits is 884736, while the sum is 43.

Adding to 131444443438 its reverse (834344444131), we get a palindrome (965788887569).

The spelling of 131444443438 in words is "one hundred thirty-one billion, four hundred forty-four million, four hundred forty-three thousand, four hundred thirty-eight".