1031320344040 has 48 divisors (see below), whose sum is σ = 2699323150500. Its totient is φ = 353595545856.

The previous prime is 1031320344017. The next prime is 1031320344049. The reversal of 1031320344040 is 404430231301.

It can be written as a sum of positive squares in 2 ways, for example, as 1016995605444 + 14324738596 = 1008462^2 + 119686^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1031320343996 and 1031320344014.

It is not an unprimeable number, because it can be changed into a prime (1031320344049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 263089965 + ... + 263093884.

Almost surely, 2^{1031320344040} is an apocalyptic number.

1031320344040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031320344040 is an abundant number, since it is smaller than the sum of its proper divisors (1668002806460).

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

1031320344040 is a wasteful number, since it uses less digits than its factorization.

1031320344040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526183874 (or 526183863 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 1031320344040 its reverse (404430231301), we get a palindrome (1435750575341).

The spelling of 1031320344040 in words is "one trillion, thirty-one billion, three hundred twenty million, three hundred forty-four thousand, forty".