2151663188 has 12 divisors (see below), whose sum is σ = 3766167552. Its totient is φ = 1075615320.

The previous prime is 2151663181. The next prime is 2151663193. The reversal of 2151663188 is 8813661512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151663181) 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, 30548 + ... + 72363.

It is an arithmetic number, because the mean of its divisors is an integer number (313847296).

Almost surely, 2^2151663188 is an apocalyptic number.

It is an amenable number.

2151663188 is a deficient number, since it is larger than the sum of its proper divisors (1614504364).

2151663188 is a wasteful number, since it uses less digits than its factorization.

2151663188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108142 (or 108140 counting only the distinct ones).

The product of its digits is 69120, while the sum is 41.

The square root of 2151663188 is about 46386.0236278127. The cubic root of 2151663188 is about 1290.9956034228.

The spelling of 2151663188 in words is "two billion, one hundred fifty-one million, six hundred sixty-three thousand, one hundred eighty-eight".