2157216652 has 6 divisors (see below), whose sum is σ = 3775129148. Its totient is φ = 1078608324.

The previous prime is 2157216641. The next prime is 2157216673. The reversal of 2157216652 is 2566127512.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269652078 + ... + 269652085.

Almost surely, 2^2157216652 is an apocalyptic number.

It is an amenable number.

2157216652 is a deficient number, since it is larger than the sum of its proper divisors (1617912496).

2157216652 is a wasteful number, since it uses less digits than its factorization.

2157216652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539304167 (or 539304165 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 2157216652 is about 46445.8464450805. The cubic root of 2157216652 is about 1292.1053400358.

The spelling of 2157216652 in words is "two billion, one hundred fifty-seven million, two hundred sixteen thousand, six hundred fifty-two".