2044402221 has 4 divisors (see below), whose sum is σ = 2725869632. Its totient is φ = 1362934812.

The previous prime is 2044402189. The next prime is 2044402249. The reversal of 2044402221 is 1222044402.

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 not a de Polignac number, because 2044402221 - 2⁵ = 2044402189 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 (2044402271) 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, 340733701 + ... + 340733706.

It is an arithmetic number, because the mean of its divisors is an integer number (681467408).

Almost surely, 2^2044402221 is an apocalyptic number.

It is an amenable number.

2044402221 is a deficient number, since it is larger than the sum of its proper divisors (681467411).

2044402221 is an equidigital number, since it uses as much as digits as its factorization.

2044402221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681467410.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 2044402221 is about 45215.0663053810. The cubic root of 2044402221 is about 1269.1767705159.

Adding to 2044402221 its reverse (1222044402), we get a palindrome (3266446623).

The spelling of 2044402221 in words is "two billion, forty-four million, four hundred two thousand, two hundred twenty-one".