2188166 has 16 divisors (see below), whose sum is σ = 3507840. Its totient is φ = 1021440.

The previous prime is 2188163. The next prime is 2188169. The reversal of 2188166 is 6618812.

It is an interprime number because it is at equal distance from previous prime (2188163) and next prime (2188169).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1190 + ... + 2406.

It is an arithmetic number, because the mean of its divisors is an integer number (219240).

2^2188166 is an apocalyptic number.

2188166 is a deficient number, since it is larger than the sum of its proper divisors (1319674).

2188166 is a wasteful number, since it uses less digits than its factorization.

2188166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279.

The product of its digits is 4608, while the sum is 32.

The square root of 2188166 is about 1479.2450777339. The cubic root of 2188166 is about 129.8255253088.

The spelling of 2188166 in words is "two million, one hundred eighty-eight thousand, one hundred sixty-six".