2221444444 has 6 divisors (see below), whose sum is σ = 3887527784. Its totient is φ = 1110722220.

The previous prime is 2221444403. The next prime is 2221444481. The reversal of 2221444444 is 4444441222.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277680552 + ... + 277680559.

Almost surely, 2^2221444444 is an apocalyptic number.

It is an amenable number.

2221444444 is a deficient number, since it is larger than the sum of its proper divisors (1666083340).

2221444444 is a wasteful number, since it uses less digits than its factorization.

2221444444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555361115 (or 555361113 counting only the distinct ones).

The product of its digits is 32768, while the sum is 31.

The square root of 2221444444 is about 47132.2017733099. The cubic root of 2221444444 is about 1304.8036176845.

Adding to 2221444444 its reverse (4444441222), we get a palindrome (6665885666).

The spelling of 2221444444 in words is "two billion, two hundred twenty-one million, four hundred forty-four thousand, four hundred forty-four".