2218143 has 32 divisors (see below), whose sum is σ = 3428352. Its totient is φ = 1267200.

The previous prime is 2218129. The next prime is 2218157. The reversal of 2218143 is 3418122.

It is an interprime number because it is at equal distance from previous prime (2218129) and next prime (2218157).

It is not a de Polignac number, because 2218143 - 2⁴ = 2218127 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 36333 + ... + 36393.

It is an arithmetic number, because the mean of its divisors is an integer number (107136).

2^2218143 is an apocalyptic number.

2218143 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2218143 is a deficient number, since it is larger than the sum of its proper divisors (1210209).

2218143 is a wasteful number, since it uses less digits than its factorization.

2218143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135.

The product of its digits is 384, while the sum is 21.

The square root of 2218143 is about 1489.3431438053. The cubic root of 2218143 is about 130.4156910560.

Subtracting from 2218143 its sum of digits (21), we obtain a palindrome (2218122).

The spelling of 2218143 in words is "two million, two hundred eighteen thousand, one hundred forty-three".