2158275915 has 32 divisors (see below), whose sum is σ = 3839784000. Its totient is φ = 1150225920.

The previous prime is 2158275907. The next prime is 2158275937. The reversal of 2158275915 is 5195728512.

2158275915 is a `hidden beast` number, since 2 + 1 + 58 + 2 + 7 + 591 + 5 = 666.

It is not a de Polignac number, because 2158275915 - 2³ = 2158275907 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 203955 + ... + 214275.

It is an arithmetic number, because the mean of its divisors is an integer number (119993250).

Almost surely, 2^2158275915 is an apocalyptic number.

2158275915 is a deficient number, since it is larger than the sum of its proper divisors (1681508085).

2158275915 is a wasteful number, since it uses less digits than its factorization.

2158275915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11884 (or 11878 counting only the distinct ones).

The product of its digits is 252000, while the sum is 45.

The square root of 2158275915 is about 46457.2482504076. The cubic root of 2158275915 is about 1292.3167939042.

The spelling of 2158275915 in words is "two billion, one hundred fifty-eight million, two hundred seventy-five thousand, nine hundred fifteen".