205505650 has 48 divisors (see below), whose sum is σ = 438971904. Its totient is φ = 70116480.

The previous prime is 205505647. The next prime is 205505669. The reversal of 205505650 is 56505502.

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, 76734 + ... + 79366.

It is an arithmetic number, because the mean of its divisors is an integer number (9145248).

Almost surely, 2^205505650 is an apocalyptic number.

205505650 is an abundant number, since it is smaller than the sum of its proper divisors (233466254).

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

205505650 is a wasteful number, since it uses less digits than its factorization.

205505650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2875 (or 2870 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 205505650 is about 14335.4682518570. The cubic root of 205505650 is about 590.1212524901.

The spelling of 205505650 in words is "two hundred five million, five hundred five thousand, six hundred fifty".