2002304221 has 4 divisors (see below), whose sum is σ = 2005636444. Its totient is φ = 1998972000.

The previous prime is 2002304197. The next prime is 2002304233. The reversal of 2002304221 is 1224032002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 630712996 + 1371591225 = 25114^2 + 37035^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002304221 - 2²⁵ = 1968749789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002304195 and 2002304204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002304281) 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, 1665210 + ... + 1666411.

It is an arithmetic number, because the mean of its divisors is an integer number (501409111).

Almost surely, 2^2002304221 is an apocalyptic number.

It is an amenable number.

2002304221 is a deficient number, since it is larger than the sum of its proper divisors (3332223).

2002304221 is an equidigital number, since it uses as much as digits as its factorization.

2002304221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332222.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 2002304221 is about 44747.1141080629. The cubic root of 2002304221 is about 1260.4047202854.

Adding to 2002304221 its reverse (1224032002), we get a palindrome (3226336223).

The spelling of 2002304221 in words is "two billion, two million, three hundred four thousand, two hundred twenty-one".