2217172 has 6 divisors (see below), whose sum is σ = 3880058. Its totient is φ = 1108584.

The previous prime is 2217143. The next prime is 2217181. The reversal of 2217172 is 2717122.

It can be written as a sum of positive squares in only one way, i.e., 1648656 + 568516 = 1284^2 + 754^2 .

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, 277143 + ... + 277150.

2^2217172 is an apocalyptic number.

It is an amenable number.

2217172 is a deficient number, since it is larger than the sum of its proper divisors (1662886).

2217172 is a wasteful number, since it uses less digits than its factorization.

2217172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554297 (or 554295 counting only the distinct ones).

The product of its digits is 392, while the sum is 22.

The square root of 2217172 is about 1489.0171254892. The cubic root of 2217172 is about 130.3966583007.

Multiplying 2217172 by its sum of digits (22), we get a palindrome (48777784).

The spelling of 2217172 in words is "two million, two hundred seventeen thousand, one hundred seventy-two".