331132320440 has 64 divisors (see below), whose sum is σ = 770531788800. Its totient is φ = 127993776768.

The previous prime is 331132320427. The next prime is 331132320451. The reversal of 331132320440 is 44023231133.

It is a super-2 number, since 2×331132320440² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 966254 + ... + 1263293.

It is an arithmetic number, because the mean of its divisors is an integer number (12039559200).

Almost surely, 2^331132320440 is an apocalyptic number.

It is an amenable number.

331132320440 is an abundant number, since it is smaller than the sum of its proper divisors (439399468360).

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

331132320440 is a wasteful number, since it uses less digits than its factorization.

331132320440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2229684 (or 2229680 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 331132320440 its reverse (44023231133), we get a palindrome (375155551573).

The spelling of 331132320440 in words is "three hundred thirty-one billion, one hundred thirty-two million, three hundred twenty thousand, four hundred forty".