2043444321 has 16 divisors (see below), whose sum is σ = 3036321600. Its totient is φ = 1358247744.

The previous prime is 2043444317. The next prime is 2043444331. The reversal of 2043444321 is 1234443402.

It is a happy number.

It is not a de Polignac number, because 2043444321 - 2² = 2043444317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2043444301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103191 + ... + 121388.

It is an arithmetic number, because the mean of its divisors is an integer number (189770100).

Almost surely, 2^2043444321 is an apocalyptic number.

It is an amenable number.

2043444321 is a deficient number, since it is larger than the sum of its proper divisors (992877279).

2043444321 is a wasteful number, since it uses less digits than its factorization.

2043444321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224925 (or 224919 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 2043444321 is about 45204.4723561729. The cubic root of 2043444321 is about 1268.9785162546.

Adding to 2043444321 its reverse (1234443402), we get a palindrome (3277887723).

The spelling of 2043444321 in words is "two billion, forty-three million, four hundred forty-four thousand, three hundred twenty-one".