2243543221 has 2 divisors, whose sum is σ = 2243543222. Its totient is φ = 2243543220.

The previous prime is 2243543201. The next prime is 2243543231. The reversal of 2243543221 is 1223453422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1442936196 + 800607025 = 37986^2 + 28295^2 .

It is a cyclic number.

It is not a de Polignac number, because 2243543221 - 2⁹ = 2243542709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2243543221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2243543201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1121771610 + 1121771611.

It is an arithmetic number, because the mean of its divisors is an integer number (1121771611).

Almost surely, 2^2243543221 is an apocalyptic number.

It is an amenable number.

2243543221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2243543221 is an equidigital number, since it uses as much as digits as its factorization.

2243543221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 28.

The square root of 2243543221 is about 47366.0555778080. The cubic root of 2243543221 is about 1309.1160481913.

Adding to 2243543221 its reverse (1223453422), we get a palindrome (3466996643).

It can be divided in two parts, 22435 and 43221, that added together give a palindrome (65656).

The spelling of 2243543221 in words is "two billion, two hundred forty-three million, five hundred forty-three thousand, two hundred twenty-one".