2003221 has 4 divisors (see below), whose sum is σ = 2185344. Its totient is φ = 1821100.

The previous prime is 2003213. The next prime is 2003237. The reversal of 2003221 is 1223002.

2003221 = T₅₉₈ + T₅₉₉ + ... + T₆₀₈.

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 2003221 - 2³ = 2003213 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2003198 and 2003207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003201) 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, 91045 + ... + 91066.

It is an arithmetic number, because the mean of its divisors is an integer number (546336).

2^2003221 is an apocalyptic number.

It is an amenable number.

2003221 is a deficient number, since it is larger than the sum of its proper divisors (182123).

2003221 is a wasteful number, since it uses less digits than its factorization.

2003221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182122.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 2003221 is about 1415.3518997055. The cubic root of 2003221 is about 126.0597054740.

Adding to 2003221 its reverse (1223002), we get a palindrome (3226223).

The spelling of 2003221 in words is "two million, three thousand, two hundred twenty-one".