2218743 has 6 divisors (see below), whose sum is σ = 3204864. Its totient is φ = 1479156.

The previous prime is 2218709. The next prime is 2218751. The reversal of 2218743 is 3478122.

It is not a de Polignac number, because 2218743 - 2¹⁴ = 2202359 is a prime.

2218743 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218343) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123255 + ... + 123272.

It is an arithmetic number, because the mean of its divisors is an integer number (534144).

2^2218743 is an apocalyptic number.

2218743 is a deficient number, since it is larger than the sum of its proper divisors (986121).

2218743 is a wasteful number, since it uses less digits than its factorization.

2218743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246533 (or 246530 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 2218743 is about 1489.5445612670. The cubic root of 2218743 is about 130.4274489935.

The spelling of 2218743 in words is "two million, two hundred eighteen thousand, seven hundred forty-three".