1331255304240 has 160 divisors (see below), whose sum is σ = 4233515632896. Its totient is φ = 345871088640.

The previous prime is 1331255304149. The next prime is 1331255304257. The reversal of 1331255304240 is 424035521331.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 3934575 + ... + 4259505.

Almost surely, 2^{1331255304240} is an apocalyptic number.

1331255304240 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 1331255304240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2116757816448).

1331255304240 is an abundant number, since it is smaller than the sum of its proper divisors (2902260328656).

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

1331255304240 is a wasteful number, since it uses less digits than its factorization.

1331255304240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325387 (or 325381 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

The spelling of 1331255304240 in words is "one trillion, three hundred thirty-one billion, two hundred fifty-five million, three hundred four thousand, two hundred forty".