2164220 has 12 divisors (see below), whose sum is σ = 4544904. Its totient is φ = 865680.

The previous prime is 2164193. The next prime is 2164223. The reversal of 2164220 is 224612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54086 + ... + 54125.

It is an arithmetic number, because the mean of its divisors is an integer number (378742).

2^2164220 is an apocalyptic number.

2164220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2164220 is an abundant number, since it is smaller than the sum of its proper divisors (2380684).

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

2164220 is a wasteful number, since it uses less digits than its factorization.

2164220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108220 (or 108218 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2164220 is about 1471.1288182889. The cubic root of 2164220 is about 129.3502091794.

Adding to 2164220 its reverse (224612), we get a palindrome (2388832).

The spelling of 2164220 in words is "two million, one hundred sixty-four thousand, two hundred twenty".