2150221 has 2 divisors, whose sum is σ = 2150222. Its totient is φ = 2150220.

The previous prime is 2150209. The next prime is 2150227. The reversal of 2150221 is 1220512.

2150221 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., 1929321 + 220900 = 1389^2 + 470^2 .

It is a cyclic number.

It is not a de Polignac number, because 2150221 - 2¹³ = 2142029 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 (2150227) 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, 1075110 + 1075111.

It is an arithmetic number, because the mean of its divisors is an integer number (1075111).

2^2150221 is an apocalyptic number.

It is an amenable number.

2150221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2150221 is an equidigital number, since it uses as much as digits as its factorization.

2150221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 2150221 is about 1466.3631882995. The cubic root of 2150221 is about 129.0707101872.

Adding to 2150221 its reverse (1220512), we get a palindrome (3370733).

The spelling of 2150221 in words is "two million, one hundred fifty thousand, two hundred twenty-one".