23444221 has 8 divisors (see below), whose sum is σ = 23930424. Its totient is φ = 22963200.

The previous prime is 23444189. The next prime is 23444231. The reversal of 23444221 is 12244432.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2604996 + 20839225 = 1614^2 + 4565^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23444221 - 2⁵ = 23444189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23444192 and 23444201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23444231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8601 + ... + 10993.

It is an arithmetic number, because the mean of its divisors is an integer number (2991303).

Almost surely, 2^23444221 is an apocalyptic number.

It is an amenable number.

23444221 is a deficient number, since it is larger than the sum of its proper divisors (486203).

23444221 is a wasteful number, since it uses less digits than its factorization.

23444221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2591.

The product of its digits is 1536, while the sum is 22.

The square root of 23444221 is about 4841.9232748981. The cubic root of 23444221 is about 286.2059131330.

Adding to 23444221 its reverse (12244432), we get a palindrome (35688653).

The spelling of 23444221 in words is "twenty-three million, four hundred forty-four thousand, two hundred twenty-one".