2106055205 has 4 divisors (see below), whose sum is σ = 2527266252. Its totient is φ = 1684844160.

The previous prime is 2106055201. The next prime is 2106055219. The reversal of 2106055205 is 5025506012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 301334881 + 1804720324 = 17359^2 + 42482^2 .

It is not a de Polignac number, because 2106055205 - 2² = 2106055201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106055201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210605516 + ... + 210605525.

It is an arithmetic number, because the mean of its divisors is an integer number (631816563).

Almost surely, 2^2106055205 is an apocalyptic number.

It is an amenable number.

2106055205 is a deficient number, since it is larger than the sum of its proper divisors (421211047).

2106055205 is an equidigital number, since it uses as much as digits as its factorization.

2106055205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421211046.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 2106055205 is about 45891.7770956846. Note that the first 3 decimals coincide. The cubic root of 2106055205 is about 1281.8088044173.

The spelling of 2106055205 in words is "two billion, one hundred six million, fifty-five thousand, two hundred five".