205030550 has 12 divisors (see below), whose sum is σ = 381356916. Its totient is φ = 82012200.

The previous prime is 205030547. The next prime is 205030561. The reversal of 205030550 is 55030502.

205030550 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2050256 + ... + 2050355.

It is an arithmetic number, because the mean of its divisors is an integer number (31779743).

Almost surely, 2^205030550 is an apocalyptic number.

205030550 is a deficient number, since it is larger than the sum of its proper divisors (176326366).

205030550 is a wasteful number, since it uses less digits than its factorization.

205030550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4100623 (or 4100618 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 20.

The square root of 205030550 is about 14318.8878758094. The cubic root of 205030550 is about 589.6661426331. Note that the first 3 decimals are identical.

The spelling of 205030550 in words is "two hundred five million, thirty thousand, five hundred fifty".