2003544221 has 16 divisors (see below), whose sum is σ = 2320281600. Its totient is φ = 1694489328.

The previous prime is 2003544217. The next prime is 2003544227. The reversal of 2003544221 is 1224453002.

It is a happy number.

It is not a de Polignac number, because 2003544221 - 2² = 2003544217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003544227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 602000 + ... + 605318.

It is an arithmetic number, because the mean of its divisors is an integer number (145017600).

Almost surely, 2^2003544221 is an apocalyptic number.

It is an amenable number.

2003544221 is a deficient number, since it is larger than the sum of its proper divisors (316737379).

2003544221 is a wasteful number, since it uses less digits than its factorization.

2003544221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4448.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2003544221 is about 44760.9676057165. The cubic root of 2003544221 is about 1260.6648504760.

Adding to 2003544221 its reverse (1224453002), we get a palindrome (3227997223).

The spelling of 2003544221 in words is "two billion, three million, five hundred forty-four thousand, two hundred twenty-one".