244423021 has 4 divisors (see below), whose sum is σ = 246181600. Its totient is φ = 242664444.

The previous prime is 244423019. The next prime is 244423079. The reversal of 244423021 is 120324442.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 244423021 - 2¹ = 244423019 is a prime.

It is a super-2 number, since 2×244423021² = 119485226389532882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 244422983 and 244423001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244423321) 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, 879081 + ... + 879358.

It is an arithmetic number, because the mean of its divisors is an integer number (61545400).

Almost surely, 2^244423021 is an apocalyptic number.

It is an amenable number.

244423021 is a deficient number, since it is larger than the sum of its proper divisors (1758579).

244423021 is a wasteful number, since it uses less digits than its factorization.

244423021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758578.

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

The square root of 244423021 is about 15634.0340603441. The cubic root of 244423021 is about 625.2408850671.

Adding to 244423021 its reverse (120324442), we get a palindrome (364747463).

The spelling of 244423021 in words is "two hundred forty-four million, four hundred twenty-three thousand, twenty-one".