2218524 has 72 divisors (see below), whose sum is σ = 6588288. Its totient is φ = 576240.

The previous prime is 2218523. The next prime is 2218547. The reversal of 2218524 is 4258122.

It is a junction number, because it is equal to n+sod(n) for n = 2218494 and 2218503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218523) 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, 201679 + ... + 201689.

It is an arithmetic number, because the mean of its divisors is an integer number (91504).

2^2218524 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2218524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3294144).

2218524 is an abundant number, since it is smaller than the sum of its proper divisors (4369764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2218524 is an equidigital number, since it uses as much as digits as its factorization.

2218524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53 (or 23 counting only the distinct ones).

The product of its digits is 1280, while the sum is 24.

The square root of 2218524 is about 1489.4710470499. The cubic root of 2218524 is about 130.4231575920.

The spelling of 2218524 in words is "two million, two hundred eighteen thousand, five hundred twenty-four".