2155805075 has 12 divisors (see below), whose sum is σ = 2813893560. Its totient is φ = 1633872960.

The previous prime is 2155805059. The next prime is 2155805083. The reversal of 2155805075 is 5705085512.

It is not a de Polignac number, because 2155805075 - 2⁴ = 2155805059 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2268794 + ... + 2269743.

It is an arithmetic number, because the mean of its divisors is an integer number (234491130).

Almost surely, 2^2155805075 is an apocalyptic number.

2155805075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2155805075 is a deficient number, since it is larger than the sum of its proper divisors (658088485).

2155805075 is a wasteful number, since it uses less digits than its factorization.

2155805075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4538566 (or 4538561 counting only the distinct ones).

The product of its (nonzero) digits is 70000, while the sum is 38.

The square root of 2155805075 is about 46430.6480140004. The cubic root of 2155805075 is about 1291.8234483758.

The spelling of 2155805075 in words is "two billion, one hundred fifty-five million, eight hundred five thousand, seventy-five".