2162321 has 6 divisors (see below), whose sum is σ = 2515410. Its totient is φ = 1853376.

The previous prime is 2162297. The next prime is 2162323. The reversal of 2162321 is 1232612.

2162321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1132096 + 1030225 = 1064^2 + 1015^2 .

It is not a de Polignac number, because 2162321 - 2¹⁰ = 2161297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2162321.

It is not an unprimeable number, because it can be changed into a prime (2162323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22016 + ... + 22113.

It is an arithmetic number, because the mean of its divisors is an integer number (419235).

2^2162321 is an apocalyptic number.

It is an amenable number.

2162321 is a deficient number, since it is larger than the sum of its proper divisors (353089).

2162321 is an equidigital number, since it uses as much as digits as its factorization.

2162321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44143 (or 44136 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 2162321 is about 1470.4832538999. The cubic root of 2162321 is about 129.3123652253.

Adding to 2162321 its reverse (1232612), we get a palindrome (3394933).

The spelling of 2162321 in words is "two million, one hundred sixty-two thousand, three hundred twenty-one".