7331321 has 4 divisors (see below), whose sum is σ = 7717200. Its totient is φ = 6945444.

The previous prime is 7331309. The next prime is 7331323. The reversal of 7331321 is 1231337.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7331321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7331293 and 7331302.

It is not an unprimeable number, because it can be changed into a prime (7331323) 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, 192911 + ... + 192948.

It is an arithmetic number, because the mean of its divisors is an integer number (1929300).

Almost surely, 2^7331321 is an apocalyptic number.

It is an amenable number.

7331321 is a deficient number, since it is larger than the sum of its proper divisors (385879).

7331321 is a wasteful number, since it uses less digits than its factorization.

7331321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385878.

The product of its digits is 378, while the sum is 20.

The square root of 7331321 is about 2707.6412243870. The cubic root of 7331321 is about 194.2647835161.

Adding to 7331321 its reverse (1231337), we get a palindrome (8562658).

The spelling of 7331321 in words is "seven million, three hundred thirty-one thousand, three hundred twenty-one".