2218865 has 8 divisors (see below), whose sum is σ = 2904768. Its totient is φ = 1613680.

The previous prime is 2218861. The next prime is 2218871. The reversal of 2218865 is 5688122.

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

It is not a de Polignac number, because 2218865 - 2² = 2218861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2218861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20117 + ... + 20226.

It is an arithmetic number, because the mean of its divisors is an integer number (363096).

2^2218865 is an apocalyptic number.

It is an amenable number.

2218865 is a deficient number, since it is larger than the sum of its proper divisors (685903).

2218865 is a wasteful number, since it uses less digits than its factorization.

2218865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40359.

The product of its digits is 7680, while the sum is 32.

The square root of 2218865 is about 1489.5855128189. The cubic root of 2218865 is about 130.4298395148.

The spelling of 2218865 in words is "two million, two hundred eighteen thousand, eight hundred sixty-five".