131343203031440 has 20 divisors (see below), whose sum is σ = 305372947048284. Its totient is φ = 52537281212544.

The previous prime is 131343203031347. The next prime is 131343203031449. The reversal of 131343203031440 is 44130302343131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 90791626199296 + 40551576832144 = 9528464^2 + 6368012^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 131343203031397 and 131343203031406.

It is not an unprimeable number, because it can be changed into a prime (131343203031449) 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, 820895018867 + ... + 820895019026.

Almost surely, 2^{131343203031440} is an apocalyptic number.

131343203031440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131343203031440 is an abundant number, since it is smaller than the sum of its proper divisors (174029744016844).

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

131343203031440 is a wasteful number, since it uses less digits than its factorization.

131343203031440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641790037906 (or 1641790037900 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 131343203031440 its reverse (44130302343131), we get a palindrome (175473505374571).

The spelling of 131343203031440 in words is "one hundred thirty-one trillion, three hundred forty-three billion, two hundred three million, thirty-one thousand, four hundred forty".