2804221 has 12 divisors (see below), whose sum is σ = 3292320. Its totient is φ = 2381400.

The previous prime is 2804209. The next prime is 2804227. The reversal of 2804221 is 1224082.

It is not a de Polignac number, because 2804221 - 2⁵ = 2804189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2804227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7210 + ... + 7588.

It is an arithmetic number, because the mean of its divisors is an integer number (274360).

2^2804221 is an apocalyptic number.

It is an amenable number.

2804221 is a deficient number, since it is larger than the sum of its proper divisors (488099).

2804221 is a wasteful number, since it uses less digits than its factorization.

2804221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 2804221 is about 1674.5808430769. The cubic root of 2804221 is about 141.0167644336.

It can be divided in two parts, 2804 and 221, that added together give a square (3025 = 55²).

The spelling of 2804221 in words is "two million, eight hundred four thousand, two hundred twenty-one".