4331321 has 4 divisors (see below), whose sum is σ = 4336500. Its totient is φ = 4326144.

The previous prime is 4331293. The next prime is 4331323. The reversal of 4331321 is 1231334.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3258025 + 1073296 = 1805^2 + 1036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4331321 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 4331321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4331323) 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, 1016 + ... + 3113.

It is an arithmetic number, because the mean of its divisors is an integer number (1084125).

Almost surely, 2^4331321 is an apocalyptic number.

It is an amenable number.

4331321 is a deficient number, since it is larger than the sum of its proper divisors (5179).

4331321 is a wasteful number, since it uses less digits than its factorization.

4331321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5178.

The product of its digits is 216, while the sum is 17.

The square root of 4331321 is about 2081.1825965061. The cubic root of 4331321 is about 163.0072010569.

Adding to 4331321 its reverse (1231334), we get a palindrome (5562655).

It can be divided in two parts, 43313 and 21, that added together give a palindrome (43334).

The spelling of 4331321 in words is "four million, three hundred thirty-one thousand, three hundred twenty-one".