1331313344240 has 160 divisors (see below), whose sum is σ = 3558399247872. Its totient is φ = 458480000000.

The previous prime is 1331313344173. The next prime is 1331313344279. The reversal of 1331313344240 is 424433131331.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1331313344197 and 1331313344206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1718615 + ... + 2369865.

Almost surely, 2^{1331313344240} is an apocalyptic number.

1331313344240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1331313344240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1779199623936).

1331313344240 is an abundant number, since it is smaller than the sum of its proper divisors (2227085903632).

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

1331313344240 is a wasteful number, since it uses less digits than its factorization.

1331313344240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651399 (or 651393 counting only the distinct ones).

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

Adding to 1331313344240 its reverse (424433131331), we get a palindrome (1755746475571).

The spelling of 1331313344240 in words is "one trillion, three hundred thirty-one billion, three hundred thirteen million, three hundred forty-four thousand, two hundred forty".