2218849 has 4 divisors (see below), whose sum is σ = 2222080. Its totient is φ = 2215620.

The previous prime is 2218837. The next prime is 2218861. The reversal of 2218849 is 9488122.

2218849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2218837) and next prime (2218861).

It is a cyclic number.

It is not a de Polignac number, because 2218849 - 2²¹ = 121697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2218549) 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 in 3 ways as a sum of consecutive naturals, for example, 129 + ... + 2110.

It is an arithmetic number, because the mean of its divisors is an integer number (555520).

2^2218849 is an apocalyptic number.

It is an amenable number.

2218849 is a deficient number, since it is larger than the sum of its proper divisors (3231).

2218849 is an equidigital number, since it uses as much as digits as its factorization.

2218849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3230.

The product of its digits is 9216, while the sum is 34.

The square root of 2218849 is about 1489.5801421877. The cubic root of 2218849 is about 130.4295260088.

The spelling of 2218849 in words is "two million, two hundred eighteen thousand, eight hundred forty-nine".