2158822185 has 16 divisors (see below), whose sum is σ = 3719817024. Its totient is φ = 1062804672.

The previous prime is 2158822157. The next prime is 2158822243. The reversal of 2158822185 is 5812288512.

It is not a de Polignac number, because 2158822185 - 2⁵ = 2158822153 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5535247 + ... + 5535636.

It is an arithmetic number, because the mean of its divisors is an integer number (232488564).

Almost surely, 2^2158822185 is an apocalyptic number.

It is an amenable number.

2158822185 is a deficient number, since it is larger than the sum of its proper divisors (1560994839).

2158822185 is a wasteful number, since it uses less digits than its factorization.

2158822185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11070904.

The product of its digits is 102400, while the sum is 42.

The square root of 2158822185 is about 46463.1271547665. The cubic root of 2158822185 is about 1292.4258152359.

The spelling of 2158822185 in words is "two billion, one hundred fifty-eight million, eight hundred twenty-two thousand, one hundred eighty-five".