2174220 has 72 divisors (see below), whose sum is σ = 6761664. Its totient is φ = 565248.

The previous prime is 2174203. The next prime is 2174243. The reversal of 2174220 is 224712.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2174193 and 2174202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8332 + ... + 8588.

It is an arithmetic number, because the mean of its divisors is an integer number (93912).

2^2174220 is an apocalyptic number.

2174220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2174220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3380832).

2174220 is an abundant number, since it is smaller than the sum of its proper divisors (4587444).

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

2174220 is a wasteful number, since it uses less digits than its factorization.

2174220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 2174220 is about 1474.5236518958. The cubic root of 2174220 is about 129.5491284109.

Adding to 2174220 its reverse (224712), we get a palindrome (2398932).

The spelling of 2174220 in words is "two million, one hundred seventy-four thousand, two hundred twenty".