331320313321 has 8 divisors (see below), whose sum is σ = 332349225480. Its totient is φ = 330291912192.

The previous prime is 331320313279. The next prime is 331320313327. The reversal of 331320313321 is 123313023133.

It can be written as a sum of positive squares in 4 ways, for example, as 3901751296 + 327418562025 = 62464^2 + 572205^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 331320313321 - 2³⁷ = 193881359849 is a prime.

It is a super-2 number, since 2×331320313321² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331320313327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1192035 + ... + 1443463.

It is an arithmetic number, because the mean of its divisors is an integer number (41543653185).

Almost surely, 2^331320313321 is an apocalyptic number.

It is an amenable number.

331320313321 is a deficient number, since it is larger than the sum of its proper divisors (1028912159).

331320313321 is a wasteful number, since it uses less digits than its factorization.

331320313321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255515.

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

Adding to 331320313321 its reverse (123313023133), we get a palindrome (454633336454).

The spelling of 331320313321 in words is "three hundred thirty-one billion, three hundred twenty million, three hundred thirteen thousand, three hundred twenty-one".