331103321 has 4 divisors (see below), whose sum is σ = 331281972. Its totient is φ = 330924672.

The previous prime is 331103293. The next prime is 331103323. The reversal of 331103321 is 123301133.

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 144480400 + 186622921 = 12020^2 + 13661^2 .

It is a cyclic number.

It is not a de Polignac number, because 331103321 - 2⁶ = 331103257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 331103321.

It is not an unprimeable number, because it can be changed into a prime (331103323) 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, 86516 + ... + 90261.

It is an arithmetic number, because the mean of its divisors is an integer number (82820493).

Almost surely, 2^331103321 is an apocalyptic number.

It is an amenable number.

331103321 is a deficient number, since it is larger than the sum of its proper divisors (178651).

331103321 is a wasteful number, since it uses less digits than its factorization.

331103321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178650.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 331103321 is about 18196.2446949913. The cubic root of 331103321 is about 691.8116092302.

Adding to 331103321 its reverse (123301133), we get a palindrome (454404454).

The spelling of 331103321 in words is "three hundred thirty-one million, one hundred three thousand, three hundred twenty-one".