2100565445 has 24 divisors (see below), whose sum is σ = 2774693880. Its totient is φ = 1525462400.

The previous prime is 2100565421. The next prime is 2100565507. The reversal of 2100565445 is 5445650012.

It can be written as a sum of positive squares in 4 ways, for example, as 603881476 + 1496683969 = 24574^2 + 38687^2 .

It is not a de Polignac number, because 2100565445 - 2²⁰ = 2099516869 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 494591 + ... + 498819.

It is an arithmetic number, because the mean of its divisors is an integer number (115612245).

Almost surely, 2^2100565445 is an apocalyptic number.

It is an amenable number.

2100565445 is a deficient number, since it is larger than the sum of its proper divisors (674128435).

2100565445 is a wasteful number, since it uses less digits than its factorization.

2100565445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5077 (or 5066 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 2100565445 is about 45831.9260450616. The cubic root of 2100565445 is about 1280.6940907186.

The spelling of 2100565445 in words is "two billion, one hundred million, five hundred sixty-five thousand, four hundred forty-five".