2170205500 has 24 divisors (see below), whose sum is σ = 4739729904. Its totient is φ = 868082000.

The previous prime is 2170205497. The next prime is 2170205501. The reversal of 2170205500 is 55020712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2170205501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2169706 + ... + 2170705.

It is an arithmetic number, because the mean of its divisors is an integer number (197488746).

Almost surely, 2^2170205500 is an apocalyptic number.

2170205500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2170205500 is an abundant number, since it is smaller than the sum of its proper divisors (2569524404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2170205500 is a wasteful number, since it uses less digits than its factorization.

2170205500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4340430 (or 4340418 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 2170205500 is about 46585.4644712275. The cubic root of 2170205500 is about 1294.6934571560.

The spelling of 2170205500 in words is "two billion, one hundred seventy million, two hundred five thousand, five hundred".