244542221 has 16 divisors (see below), whose sum is σ = 305233920. Its totient is φ = 190333680.

The previous prime is 244542203. The next prime is 244542253. The reversal of 244542221 is 122245442.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-244542221 is a prime.

It is a super-2 number, since 2×244542221² = 119601795703225682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244542271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109700 + ... + 111906.

It is an arithmetic number, because the mean of its divisors is an integer number (19077120).

Almost surely, 2^244542221 is an apocalyptic number.

It is an amenable number.

244542221 is a deficient number, since it is larger than the sum of its proper divisors (60691699).

244542221 is a wasteful number, since it uses less digits than its factorization.

244542221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3664.

The product of its digits is 5120, while the sum is 26.

The square root of 244542221 is about 15637.8457915405. The cubic root of 244542221 is about 625.3425075208.

Adding to 244542221 its reverse (122245442), we get a palindrome (366787663).

The spelling of 244542221 in words is "two hundred forty-four million, five hundred forty-two thousand, two hundred twenty-one".