2105770771 has 4 divisors (see below), whose sum is σ = 2267753152. Its totient is φ = 1943788392.

The previous prime is 2105770747. The next prime is 2105770781. The reversal of 2105770771 is 1770775012.

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

It is not a de Polignac number, because 2105770771 - 2⁷ = 2105770643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2105770771.

It is not an unprimeable number, because it can be changed into a prime (2105770781) 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, 80991171 + ... + 80991196.

It is an arithmetic number, because the mean of its divisors is an integer number (566938288).

Almost surely, 2^2105770771 is an apocalyptic number.

2105770771 is a deficient number, since it is larger than the sum of its proper divisors (161982381).

2105770771 is a wasteful number, since it uses less digits than its factorization.

2105770771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161982380.

The product of its (nonzero) digits is 24010, while the sum is 37.

The square root of 2105770771 is about 45888.6780262844. The cubic root of 2105770771 is about 1281.7510967784.

The spelling of 2105770771 in words is "two billion, one hundred five million, seven hundred seventy thousand, seven hundred seventy-one".