2216618 has 8 divisors (see below), whose sum is σ = 3379620. Its totient is φ = 1090080.

The previous prime is 2216611. The next prime is 2216629. The reversal of 2216618 is 8166122.

It can be written as a sum of positive squares in 2 ways, for example, as 1708249 + 508369 = 1307^2 + 713^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2216611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8963 + ... + 9206.

2^2216618 is an apocalyptic number.

2216618 is a deficient number, since it is larger than the sum of its proper divisors (1163002).

2216618 is a wasteful number, since it uses less digits than its factorization.

2216618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18232.

The product of its digits is 1152, while the sum is 26.

The square root of 2216618 is about 1488.8310851134. The cubic root of 2216618 is about 130.3857967518.

The spelling of 2216618 in words is "two million, two hundred sixteen thousand, six hundred eighteen".