244443231421 has 4 divisors (see below), whose sum is σ = 258822245052. Its totient is φ = 230064217792.

The previous prime is 244443231419. The next prime is 244443231457. The reversal of 244443231421 is 124132344442.

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 135434304196 + 109008927225 = 368014^2 + 330165^2 .

It is a cyclic number.

It is not a de Polignac number, because 244443231421 - 2¹ = 244443231419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244443201421) 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, 7189506790 + ... + 7189506823.

It is an arithmetic number, because the mean of its divisors is an integer number (64705561263).

Almost surely, 2^244443231421 is an apocalyptic number.

It is an amenable number.

244443231421 is a deficient number, since it is larger than the sum of its proper divisors (14379013631).

244443231421 is a wasteful number, since it uses less digits than its factorization.

244443231421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14379013630.

The product of its digits is 73728, while the sum is 34.

Adding to 244443231421 its reverse (124132344442), we get a palindrome (368575575863).

The spelling of 244443231421 in words is "two hundred forty-four billion, four hundred forty-three million, two hundred thirty-one thousand, four hundred twenty-one".