244221989 has 4 divisors (see below), whose sum is σ = 266424000. Its totient is φ = 222019980.

The previous prime is 244221907. The next prime is 244222019. The reversal of 244221989 is 989122442.

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 244221989 - 2¹² = 244217893 is a prime.

It is a super-2 number, since 2×244221989² = 119288759822232242, 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 (244221389) 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, 11100989 + ... + 11101010.

It is an arithmetic number, because the mean of its divisors is an integer number (66606000).

Almost surely, 2^244221989 is an apocalyptic number.

It is an amenable number.

244221989 is a deficient number, since it is larger than the sum of its proper divisors (22202011).

244221989 is a wasteful number, since it uses less digits than its factorization.

244221989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22202010.

The product of its digits is 82944, while the sum is 41.

The square root of 244221989 is about 15627.6034311087. The cubic root of 244221989 is about 625.0694229018.

The spelling of 244221989 in words is "two hundred forty-four million, two hundred twenty-one thousand, nine hundred eighty-nine".