2153321 has 2 divisors, whose sum is σ = 2153322. Its totient is φ = 2153320.

The previous prime is 2153317. The next prime is 2153341. The reversal of 2153321 is 1233512.

2153321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1413721 + 739600 = 1189^2 + 860^2 .

It is a cyclic number.

It is not a de Polignac number, because 2153321 - 2² = 2153317 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2153321.

It is not a weakly prime, because it can be changed into another prime (2153341) 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 as a sum of consecutive naturals, namely, 1076660 + 1076661.

It is an arithmetic number, because the mean of its divisors is an integer number (1076661).

2^2153321 is an apocalyptic number.

It is an amenable number.

2153321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2153321 is an equidigital number, since it uses as much as digits as its factorization.

2153321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180, while the sum is 17.

The square root of 2153321 is about 1467.4198444890. The cubic root of 2153321 is about 129.1327080112.

Adding to 2153321 its reverse (1233512), we get a palindrome (3386833).

The spelling of 2153321 in words is "two million, one hundred fifty-three thousand, three hundred twenty-one".