2522321 has 4 divisors (see below), whose sum is σ = 2526132. Its totient is φ = 2518512.

The previous prime is 2522297. The next prime is 2522329. The reversal of 2522321 is 1232252.

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 287296 + 2235025 = 536^2 + 1495^2 .

It is a cyclic number.

It is not a de Polignac number, because 2522321 - 2⁶ = 2522257 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 2522321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2522329) 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, 626 + ... + 2331.

It is an arithmetic number, because the mean of its divisors is an integer number (631533).

2^2522321 is an apocalyptic number.

It is an amenable number.

2522321 is a deficient number, since it is larger than the sum of its proper divisors (3811).

2522321 is an equidigital number, since it uses as much as digits as its factorization.

2522321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3810.

The product of its digits is 240, while the sum is 17.

The square root of 2522321 is about 1588.1816646719. The cubic root of 2522321 is about 136.1236080648.

Adding to 2522321 its reverse (1232252), we get a palindrome (3754573).

The spelling of 2522321 in words is "two million, five hundred twenty-two thousand, three hundred twenty-one".