2102555565 has 48 divisors (see below), whose sum is σ = 4043183040. Its totient is φ = 1002128640.

The previous prime is 2102555537. The next prime is 2102555569. The reversal of 2102555565 is 5655552012.

2102555565 is a `hidden beast` number, since 21 + 0 + 25 + 55 + 565 = 666.

It is not a de Polignac number, because 2102555565 - 2⁷ = 2102555437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102555569) 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 47 ways as a sum of consecutive naturals, for example, 6792 + ... + 65201.

It is an arithmetic number, because the mean of its divisors is an integer number (84232980).

Almost surely, 2^2102555565 is an apocalyptic number.

It is an amenable number.

2102555565 is a deficient number, since it is larger than the sum of its proper divisors (1940627475).

2102555565 is a wasteful number, since it uses less digits than its factorization.

2102555565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72074 (or 72071 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The square root of 2102555565 is about 45853.6319717424. The cubic root of 2102555565 is about 1281.0984152533.

The spelling of 2102555565 in words is "two billion, one hundred two million, five hundred fifty-five thousand, five hundred sixty-five".