2218945 has 8 divisors (see below), whose sum is σ = 2681280. Its totient is φ = 1762800.

The previous prime is 2218943. The next prime is 2218967. The reversal of 2218945 is 5498122.

2218945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2218945 - 2¹ = 2218943 is a prime.

2218945 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2218943) 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 7 ways as a sum of consecutive naturals, for example, 715 + ... + 2224.

It is an arithmetic number, because the mean of its divisors is an integer number (335160).

2^2218945 is an apocalyptic number.

It is an amenable number.

2218945 is a deficient number, since it is larger than the sum of its proper divisors (462335).

2218945 is a wasteful number, since it uses less digits than its factorization.

2218945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3095.

The product of its digits is 5760, while the sum is 31.

The square root of 2218945 is about 1489.6123656844. The cubic root of 2218945 is about 130.4314070221.

The spelling of 2218945 in words is "two million, two hundred eighteen thousand, nine hundred forty-five".