2216168 has 8 divisors (see below), whose sum is σ = 4155330. Its totient is φ = 1108080.

The previous prime is 2216167. The next prime is 2216197. The reversal of 2216168 is 8616122.

It can be written as a sum of positive squares in only one way, i.e., 2184484 + 31684 = 1478^2 + 178^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×2216168² = 9822801208448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2216161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138503 + ... + 138518.

2^2216168 is an apocalyptic number.

It is an amenable number.

2216168 is a deficient number, since it is larger than the sum of its proper divisors (1939162).

2216168 is a wasteful number, since it uses less digits than its factorization.

2216168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277027 (or 277023 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 2216168 is about 1488.6799521724. The cubic root of 2216168 is about 130.3769728619.

The spelling of 2216168 in words is "two million, two hundred sixteen thousand, one hundred sixty-eight".