2213172 has 36 divisors (see below), whose sum is σ = 6026020. Its totient is φ = 680832.

The previous prime is 2213171. The next prime is 2213191. The reversal of 2213172 is 2713122.

It can be written as a sum of positive squares in 2 ways, for example, as 156816 + 2056356 = 396^2 + 1434^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2213171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1897 + ... + 2832.

2^2213172 is an apocalyptic number.

It is an amenable number.

2213172 is an abundant number, since it is smaller than the sum of its proper divisors (3812848).

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

2213172 is a wasteful number, since it uses less digits than its factorization.

2213172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4752 (or 4747 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 2213172 is about 1487.6733512435. The cubic root of 2213172 is about 130.3181948928.

Adding to 2213172 its reverse (2713122), we get a palindrome (4926294).

The spelling of 2213172 in words is "two million, two hundred thirteen thousand, one hundred seventy-two".