244444421 has 4 divisors (see below), whose sum is σ = 263247852. Its totient is φ = 225640992.

The previous prime is 244444399. The next prime is 244444433. The reversal of 244444421 is 124444442.

244444421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124444442 = 2 ⋅62222221.

It can be written as a sum of positive squares in 2 ways, for example, as 146652100 + 97792321 = 12110^2 + 9889^2 .

It is a cyclic number.

It is not a de Polignac number, because 244444421 - 2⁶ = 244444357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244444471) 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, 9401696 + ... + 9401721.

It is an arithmetic number, because the mean of its divisors is an integer number (65811963).

Almost surely, 2^244444421 is an apocalyptic number.

It is an amenable number.

244444421 is a deficient number, since it is larger than the sum of its proper divisors (18803431).

244444421 is a wasteful number, since it uses less digits than its factorization.

244444421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18803430.

The product of its digits is 16384, while the sum is 29.

The square root of 244444421 is about 15634.7184496556. The cubic root of 244444421 is about 625.2591317996.

Adding to 244444421 its reverse (124444442), we get a palindrome (368888863).

The spelling of 244444421 in words is "two hundred forty-four million, four hundred forty-four thousand, four hundred twenty-one".