2170190805 has 32 divisors (see below), whose sum is σ = 3645112320. Its totient is φ = 1101099840.

The previous prime is 2170190801. The next prime is 2170190861. The reversal of 2170190805 is 5080910712.

It is not a de Polignac number, because 2170190805 - 2² = 2170190801 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2170190801) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 12117 + ... + 66986.

It is an arithmetic number, because the mean of its divisors is an integer number (113909760).

Almost surely, 2^2170190805 is an apocalyptic number.

It is an amenable number.

2170190805 is a deficient number, since it is larger than the sum of its proper divisors (1474921515).

2170190805 is a wasteful number, since it uses less digits than its factorization.

2170190805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79201.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 2170190805 is about 46585.3067500902. The cubic root of 2170190805 is about 1294.6905349192.

The spelling of 2170190805 in words is "two billion, one hundred seventy million, one hundred ninety thousand, eight hundred five".