320031352321 has 4 divisors (see below), whose sum is σ = 320172399700. Its totient is φ = 319890304944.

The previous prime is 320031352309. The next prime is 320031352357. The reversal of 320031352321 is 123253130023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 165079690000 + 154951662321 = 406300^2 + 393639^2 .

It is a cyclic number.

It is not a de Polignac number, because 320031352321 - 2¹¹ = 320031350273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320031352621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70520286 + ... + 70524823.

It is an arithmetic number, because the mean of its divisors is an integer number (80043099925).

Almost surely, 2^320031352321 is an apocalyptic number.

It is an amenable number.

320031352321 is a deficient number, since it is larger than the sum of its proper divisors (141047379).

320031352321 is a wasteful number, since it uses less digits than its factorization.

320031352321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141047378.

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 320031352321 its reverse (123253130023), we get a palindrome (443284482344).

The spelling of 320031352321 in words is "three hundred twenty billion, thirty-one million, three hundred fifty-two thousand, three hundred twenty-one".