2100572505 has 24 divisors (see below), whose sum is σ = 3643930368. Its totient is φ = 1119401376.

The previous prime is 2100572501. The next prime is 2100572521. The reversal of 2100572505 is 5052750012.

It is a happy number.

2100572505 is a `hidden beast` number, since 2 + 100 + 57 + 2 + 505 = 666.

It is not a de Polignac number, because 2100572505 - 2² = 2100572501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2100572501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39544 + ... + 75926.

It is an arithmetic number, because the mean of its divisors is an integer number (151830432).

Almost surely, 2^2100572505 is an apocalyptic number.

It is an amenable number.

2100572505 is a deficient number, since it is larger than the sum of its proper divisors (1543357863).

2100572505 is a wasteful number, since it uses less digits than its factorization.

2100572505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37677 (or 37674 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 2100572505 is about 45832.0030655436. The cubic root of 2100572505 is about 1280.6955255211.

The spelling of 2100572505 in words is "two billion, one hundred million, five hundred seventy-two thousand, five hundred five".