2196221 has 2 divisors, whose sum is σ = 2196222. Its totient is φ = 2196220.

The previous prime is 2196197. The next prime is 2196239. The reversal of 2196221 is 1226912.

2196221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2044900 + 151321 = 1430^2 + 389^2 .

It is a cyclic number.

It is not a de Polignac number, because 2196221 - 2¹⁸ = 1934077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2199221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098110 + 1098111.

It is an arithmetic number, because the mean of its divisors is an integer number (1098111).

2^2196221 is an apocalyptic number.

It is an amenable number.

2196221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2196221 is an equidigital number, since it uses as much as digits as its factorization.

2196221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 23.

The square root of 2196221 is about 1481.9652492552. The cubic root of 2196221 is about 129.9846332921.

The spelling of 2196221 in words is "two million, one hundred ninety-six thousand, two hundred twenty-one".