2218869 has 12 divisors (see below), whose sum is σ = 3238092. Its totient is φ = 1464000.

The previous prime is 2218861. The next prime is 2218871. The reversal of 2218869 is 9688122.

It can be written as a sum of positive squares in 2 ways, for example, as 1238769 + 980100 = 1113^2 + 990^2 .

It is not a de Polignac number, because 2218869 - 2³ = 2218861 is a prime.

It is a super-2 number, since 2×2218869² = 9846759278322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218861) 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 11 ways as a sum of consecutive naturals, for example, 312 + ... + 2129.

It is an arithmetic number, because the mean of its divisors is an integer number (269841).

2^2218869 is an apocalyptic number.

It is an amenable number.

2218869 is a deficient number, since it is larger than the sum of its proper divisors (1019223).

2218869 is a wasteful number, since it uses less digits than its factorization.

2218869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2548 (or 2545 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 2218869 is about 1489.5868554737. The cubic root of 2218869 is about 130.4299178910.

The spelling of 2218869 in words is "two million, two hundred eighteen thousand, eight hundred sixty-nine".