321310331340 has 96 divisors (see below), whose sum is σ = 914192348160. Its totient is φ = 84310177536.

The previous prime is 321310331261. The next prime is 321310331347. The reversal of 321310331340 is 43133013123.

It is a happy number.

321310331340 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 321310331340.

It is not an unprimeable number, because it can be changed into a prime (321310331347) 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, 804681 + ... + 1135839.

It is an arithmetic number, because the mean of its divisors is an integer number (9522836960).

Almost surely, 2^321310331340 is an apocalyptic number.

321310331340 is a gapful number since it is divisible by the number (30) 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 321310331340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (457096174080).

321310331340 is an abundant number, since it is smaller than the sum of its proper divisors (592882016820).

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

321310331340 is a wasteful number, since it uses less digits than its factorization.

321310331340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331431 (or 331429 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 321310331340 its reverse (43133013123), we get a palindrome (364443344463).

The spelling of 321310331340 in words is "three hundred twenty-one billion, three hundred ten million, three hundred thirty-one thousand, three hundred forty".