2108122887 has 16 divisors (see below), whose sum is σ = 3027909248. Its totient is φ = 1296937440.

The previous prime is 2108122883. The next prime is 2108122901. The reversal of 2108122887 is 7882218012.

It is not a de Polignac number, because 2108122887 - 2² = 2108122883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2108122883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207312 + ... + 217242.

It is an arithmetic number, because the mean of its divisors is an integer number (189244328).

Almost surely, 2^2108122887 is an apocalyptic number.

2108122887 is a deficient number, since it is larger than the sum of its proper divisors (919786361).

2108122887 is a wasteful number, since it uses less digits than its factorization.

2108122887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15390.

The product of its (nonzero) digits is 28672, while the sum is 39.

The square root of 2108122887 is about 45914.2993739423. The cubic root of 2108122887 is about 1282.2281517827.

The spelling of 2108122887 in words is "two billion, one hundred eight million, one hundred twenty-two thousand, eight hundred eighty-seven".