2218642915 has 4 divisors (see below), whose sum is σ = 2662371504. Its totient is φ = 1774914328.

The previous prime is 2218642897. The next prime is 2218642927. The reversal of 2218642915 is 5192468122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2218642915 - 2¹¹ = 2218640867 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221864287 + ... + 221864296.

It is an arithmetic number, because the mean of its divisors is an integer number (665592876).

Almost surely, 2^2218642915 is an apocalyptic number.

2218642915 is a deficient number, since it is larger than the sum of its proper divisors (443728589).

2218642915 is an equidigital number, since it uses as much as digits as its factorization.

2218642915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443728588.

The product of its digits is 69120, while the sum is 40.

The square root of 2218642915 is about 47102.4724934902. The cubic root of 2218642915 is about 1304.2548781884.

The spelling of 2218642915 in words is "two billion, two hundred eighteen million, six hundred forty-two thousand, nine hundred fifteen".