2220289 has 2 divisors, whose sum is σ = 2220290. Its totient is φ = 2220288.

The previous prime is 2220277. The next prime is 2220293. The reversal of 2220289 is 9820222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2073600 + 146689 = 1440^2 + 383^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220289 - 2¹³ = 2212097 is a prime.

It is not a weakly prime, because it can be changed into another prime (2220209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110144 + 1110145.

It is an arithmetic number, because the mean of its divisors is an integer number (1110145).

2^2220289 is an apocalyptic number.

It is an amenable number.

2220289 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220289 is an equidigital number, since it uses as much as digits as its factorization.

2220289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 2220289 is about 1490.0634214690. The cubic root of 2220289 is about 130.4577355146.

The spelling of 2220289 in words is "two million, two hundred twenty thousand, two hundred eighty-nine".