1315513131044 has 36 divisors (see below), whose sum is σ = 2687148953244. Its totient is φ = 561867114816.

The previous prime is 1315513130993. The next prime is 1315513131059. The reversal of 1315513131044 is 4401313155131.

It can be written as a sum of positive squares in 2 ways, for example, as 1180508326144 + 135004804900 = 1086512^2 + 367430^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1315513131044.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11396159 + ... + 11511014.

It is an arithmetic number, because the mean of its divisors is an integer number (74643026479).

Almost surely, 2^{1315513131044} is an apocalyptic number.

1315513131044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1315513131044 is an abundant number, since it is smaller than the sum of its proper divisors (1371635822200).

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

1315513131044 is a wasteful number, since it uses less digits than its factorization.

1315513131044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22907484 (or 22907475 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

Adding to 1315513131044 its reverse (4401313155131), we get a palindrome (5716826286175).

The spelling of 1315513131044 in words is "one trillion, three hundred fifteen billion, five hundred thirteen million, one hundred thirty-one thousand, forty-four".