2221172 has 6 divisors (see below), whose sum is σ = 3887058. Its totient is φ = 1110584.

The previous prime is 2221159. The next prime is 2221183. The reversal of 2221172 is 2711222.

2221172 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1865956 + 355216 = 1366^2 + 596^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2221172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277643 + ... + 277650.

It is an arithmetic number, because the mean of its divisors is an integer number (647843).

2^2221172 is an apocalyptic number.

It is an amenable number.

2221172 is a deficient number, since it is larger than the sum of its proper divisors (1665886).

2221172 is a wasteful number, since it uses less digits than its factorization.

2221172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555297 (or 555295 counting only the distinct ones).

The product of its digits is 112, while the sum is 17.

The square root of 2221172 is about 1490.3596881290. The cubic root of 2221172 is about 130.4750273947.

Adding to 2221172 its reverse (2711222), we get a palindrome (4932394).

The spelling of 2221172 in words is "two million, two hundred twenty-one thousand, one hundred seventy-two".