331323321013 has 6 divisors (see below), whose sum is σ = 349679184054. Its totient is φ = 313885251144.

The previous prime is 331323320983. The next prime is 331323321019. The reversal of 331323321013 is 310123323133.

It can be written as a sum of positive squares in only one way, i.e., 308604692484 + 22718628529 = 555522^2 + 150727^2 .

It is not a de Polignac number, because 331323321013 - 2²¹ = 331321223861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331323321019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 458896206 + ... + 458896927.

It is an arithmetic number, because the mean of its divisors is an integer number (58279864009).

Almost surely, 2^331323321013 is an apocalyptic number.

It is an amenable number.

331323321013 is a deficient number, since it is larger than the sum of its proper divisors (18355863041).

331323321013 is an equidigital number, since it uses as much as digits as its factorization.

331323321013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917793171 (or 917793152 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 25.

Adding to 331323321013 its reverse (310123323133), we get a palindrome (641446644146).

The spelling of 331323321013 in words is "three hundred thirty-one billion, three hundred twenty-three million, three hundred twenty-one thousand, thirteen".