2159534187 has 6 divisors (see below), whose sum is σ = 3119327172. Its totient is φ = 1439689452.

The previous prime is 2159534177. The next prime is 2159534189. The reversal of 2159534187 is 7814359512.

2159534187 is a `hidden beast` number, since 21 + 595 + 34 + 1 + 8 + 7 = 666.

It is not a de Polignac number, because 2159534187 - 2¹⁹ = 2159009899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2159534189) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119974113 + ... + 119974130.

It is an arithmetic number, because the mean of its divisors is an integer number (519887862).

Almost surely, 2^2159534187 is an apocalyptic number.

2159534187 is a deficient number, since it is larger than the sum of its proper divisors (959792985).

2159534187 is a wasteful number, since it uses less digits than its factorization.

2159534187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239948249 (or 239948246 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 2159534187 is about 46470.7885343040. The cubic root of 2159534187 is about 1292.5678847751.

The spelling of 2159534187 in words is "two billion, one hundred fifty-nine million, five hundred thirty-four thousand, one hundred eighty-seven".