2172188884 has 6 divisors (see below), whose sum is σ = 3801330554. Its totient is φ = 1086094440.

The previous prime is 2172188881. The next prime is 2172188911. The reversal of 2172188884 is 4888812712.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1123724484 + 1048464400 = 33522^2 + 32380^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172188881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271523607 + ... + 271523614.

Almost surely, 2^2172188884 is an apocalyptic number.

It is an amenable number.

2172188884 is a deficient number, since it is larger than the sum of its proper divisors (1629141670).

2172188884 is a wasteful number, since it uses less digits than its factorization.

2172188884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543047225 (or 543047223 counting only the distinct ones).

The product of its digits is 458752, while the sum is 49.

The square root of 2172188884 is about 46606.7471939418. The cubic root of 2172188884 is about 1295.0877504478.

The spelling of 2172188884 in words is "two billion, one hundred seventy-two million, one hundred eighty-eight thousand, eight hundred eighty-four".