2211889 has 2 divisors, whose sum is σ = 2211890. Its totient is φ = 2211888.

The previous prime is 2211883. The next prime is 2211893. The reversal of 2211889 is 9881122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2117025 + 94864 = 1455^2 + 308^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211889 - 2¹¹ = 2209841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2211889.

It is not a weakly prime, because it can be changed into another prime (2211883) 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, 1105944 + 1105945.

It is an arithmetic number, because the mean of its divisors is an integer number (1105945).

2^2211889 is an apocalyptic number.

It is an amenable number.

2211889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211889 is an equidigital number, since it uses as much as digits as its factorization.

2211889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 31.

The square root of 2211889 is about 1487.2420784795. The cubic root of 2211889 is about 130.2930077311.

It can be divided in two parts, 22 and 11889, that added together give a palindrome (11911).

The spelling of 2211889 in words is "two million, two hundred eleven thousand, eight hundred eighty-nine".