321043342102440 has 128 divisors (see below), whose sum is σ = 975917141821440. Its totient is φ = 84480799493376.

The previous prime is 321043342102267. The next prime is 321043342102447. The reversal of 321043342102440 is 44201243340123.

It is not an unprimeable number, because it can be changed into a prime (321043342102447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42393252 + ... + 49389011.

It is an arithmetic number, because the mean of its divisors is an integer number (7624352670480).

Almost surely, 2^{321043342102440} is an apocalyptic number.

321043342102440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321043342102440 is an abundant number, since it is smaller than the sum of its proper divisors (654873799719000).

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

321043342102440 is a wasteful number, since it uses less digits than its factorization.

321043342102440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91782663 (or 91782659 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 33.

Adding to 321043342102440 its reverse (44201243340123), we get a palindrome (365244585442563).

The spelling of 321043342102440 in words is "three hundred twenty-one trillion, forty-three billion, three hundred forty-two million, one hundred two thousand, four hundred forty".