221324189 has 2 divisors, whose sum is σ = 221324190. Its totient is φ = 221324188.

The previous prime is 221324183. The next prime is 221324203. The reversal of 221324189 is 981423122.

221324189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221265625 + 58564 = 14875^2 + 242^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221324189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221324183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110662094 + 110662095.

It is an arithmetic number, because the mean of its divisors is an integer number (110662095).

Almost surely, 2^221324189 is an apocalyptic number.

It is an amenable number.

221324189 is a deficient number, since it is larger than the sum of its proper divisors (1).

221324189 is an equidigital number, since it uses as much as digits as its factorization.

221324189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 32.

The square root of 221324189 is about 14876.9684075755. The cubic root of 221324189 is about 604.8898453913.

The spelling of 221324189 in words is "two hundred twenty-one million, three hundred twenty-four thousand, one hundred eighty-nine".