2204221 has 2 divisors, whose sum is σ = 2204222. Its totient is φ = 2204220.

The previous prime is 2204207. The next prime is 2204243. The reversal of 2204221 is 1224022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1322500 + 881721 = 1150^2 + 939^2 .

It is a cyclic number.

It is not a de Polignac number, because 2204221 - 2²¹ = 107069 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2204821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1102110 + 1102111.

It is an arithmetic number, because the mean of its divisors is an integer number (1102111).

2^2204221 is an apocalyptic number.

It is an amenable number.

2204221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2204221 is an equidigital number, since it uses as much as digits as its factorization.

2204221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 2204221 is about 1484.6619143765. The cubic root of 2204221 is about 130.1422702800.

Adding to 2204221 its reverse (1224022), we get a palindrome (3428243).

The spelling of 2204221 in words is "two million, two hundred four thousand, two hundred twenty-one".