6331321 has 2 divisors, whose sum is σ = 6331322. Its totient is φ = 6331320.

The previous prime is 6331319. The next prime is 6331333. The reversal of 6331321 is 1231336.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5812921 + 518400 = 2411^2 + 720^2 .

It is a cyclic number.

It is not a de Polignac number, because 6331321 - 2¹ = 6331319 is a prime.

Together with 6331319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6331301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3165660 + 3165661.

It is an arithmetic number, because the mean of its divisors is an integer number (3165661).

Almost surely, 2^6331321 is an apocalyptic number.

It is an amenable number.

6331321 is a deficient number, since it is larger than the sum of its proper divisors (1).

6331321 is an equidigital number, since it uses as much as digits as its factorization.

6331321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 19.

The square root of 6331321 is about 2516.2116365680. The cubic root of 6331321 is about 184.9970391540.

Adding to 6331321 its reverse (1231336), we get a palindrome (7562657).

The spelling of 6331321 in words is "six million, three hundred thirty-one thousand, three hundred twenty-one".