2166224 has 10 divisors (see below), whose sum is σ = 4197090. Its totient is φ = 1083104.

The previous prime is 2166221. The next prime is 2166233. The reversal of 2166224 is 4226612.

It can be written as a sum of positive squares in only one way, i.e., 2050624 + 115600 = 1432^2 + 340^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2166224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67679 + ... + 67710.

It is an arithmetic number, because the mean of its divisors is an integer number (419709).

2^2166224 is an apocalyptic number.

It is an amenable number.

2166224 is a deficient number, since it is larger than the sum of its proper divisors (2030866).

2166224 is a wasteful number, since it uses less digits than its factorization.

2166224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135397 (or 135391 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 2166224 is about 1471.8097703168. The cubic root of 2166224 is about 129.3901216115.

The spelling of 2166224 in words is "two million, one hundred sixty-six thousand, two hundred twenty-four".