2189817572 has 12 divisors (see below), whose sum is σ = 3832508400. Its totient is φ = 1094815176.

The previous prime is 2189817569. The next prime is 2189817577. The reversal of 2189817572 is 2757189812.

It is a self number, because there is not a number n which added to its sum of digits gives 2189817572.

It is not an unprimeable number, because it can be changed into a prime (2189817577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79679 + ... + 103577.

It is an arithmetic number, because the mean of its divisors is an integer number (319375700).

Almost surely, 2^2189817572 is an apocalyptic number.

It is an amenable number.

2189817572 is a deficient number, since it is larger than the sum of its proper divisors (1642690828).

2189817572 is a wasteful number, since it uses less digits than its factorization.

2189817572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46810 (or 46808 counting only the distinct ones).

The product of its digits is 564480, while the sum is 50.

The square root of 2189817572 is about 46795.4866627114. The cubic root of 2189817572 is about 1298.5818009521.

The spelling of 2189817572 in words is "two billion, one hundred eighty-nine million, eight hundred seventeen thousand, five hundred seventy-two".