131443421140 has 12 divisors (see below), whose sum is σ = 276031184436. Its totient is φ = 52577368448.

The previous prime is 131443421117. The next prime is 131443421149. The reversal of 131443421140 is 41124344131.

It can be written as a sum of positive squares in 2 ways, for example, as 71627957956 + 59815463184 = 267634^2 + 244572^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131443421099 and 131443421108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131443421149) 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, 3286085509 + ... + 3286085548.

It is an arithmetic number, because the mean of its divisors is an integer number (23002598703).

Almost surely, 2^131443421140 is an apocalyptic number.

131443421140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131443421140 is an abundant number, since it is smaller than the sum of its proper divisors (144587763296).

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

131443421140 is a wasteful number, since it uses less digits than its factorization.

131443421140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6572171066 (or 6572171064 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 131443421140 its reverse (41124344131), we get a palindrome (172567765271).

The spelling of 131443421140 in words is "one hundred thirty-one billion, four hundred forty-three million, four hundred twenty-one thousand, one hundred forty".