2218545 has 24 divisors (see below), whose sum is σ = 4395456. Its totient is φ = 1014048.

The previous prime is 2218523. The next prime is 2218547. The reversal of 2218545 is 5458122.

It is a happy number.

It is not a de Polignac number, because 2218545 - 2⁸ = 2218289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2218547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3207 + ... + 3836.

It is an arithmetic number, because the mean of its divisors is an integer number (183144).

2^2218545 is an apocalyptic number.

It is an amenable number.

2218545 is a deficient number, since it is larger than the sum of its proper divisors (2176911).

2218545 is a wasteful number, since it uses less digits than its factorization.

2218545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7061 (or 7058 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 2218545 is about 1489.4780965157. The cubic root of 2218545 is about 130.4235691085.

The spelling of 2218545 in words is "two million, two hundred eighteen thousand, five hundred forty-five".