2211389 has 4 divisors (see below), whose sum is σ = 2241756. Its totient is φ = 2181024.

The previous prime is 2211373. The next prime is 2211409. The reversal of 2211389 is 9831122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1092025 + 1119364 = 1045^2 + 1058^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211389 - 2⁴ = 2211373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15074 + ... + 15219.

It is an arithmetic number, because the mean of its divisors is an integer number (560439).

2^2211389 is an apocalyptic number.

It is an amenable number.

2211389 is a deficient number, since it is larger than the sum of its proper divisors (30367).

2211389 is an equidigital number, since it uses as much as digits as its factorization.

2211389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30366.

The product of its digits is 864, while the sum is 26.

The square root of 2211389 is about 1487.0739726053. The cubic root of 2211389 is about 130.2831893642.

It can be divided in two parts, 22 and 11389, that added together give a palindrome (11411).

The spelling of 2211389 in words is "two million, two hundred eleven thousand, three hundred eighty-nine".