2423221 has 4 divisors (see below), whose sum is σ = 2433600. Its totient is φ = 2412844.

The previous prime is 2423219. The next prime is 2423227. The reversal of 2423221 is 1223242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1223242 = 2 ⋅611621.

It is a cyclic number.

It is not a de Polignac number, because 2423221 - 2¹ = 2423219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2423195 and 2423204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2423227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4831 + ... + 5308.

It is an arithmetic number, because the mean of its divisors is an integer number (608400).

2^2423221 is an apocalyptic number.

It is an amenable number.

2423221 is a deficient number, since it is larger than the sum of its proper divisors (10379).

2423221 is a wasteful number, since it uses less digits than its factorization.

2423221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10378.

The product of its digits is 192, while the sum is 16.

The square root of 2423221 is about 1556.6698429661. The cubic root of 2423221 is about 134.3170076782.

Adding to 2423221 its reverse (1223242), we get a palindrome (3646463).

The spelling of 2423221 in words is "two million, four hundred twenty-three thousand, two hundred twenty-one".