205209304 has 16 divisors (see below), whose sum is σ = 384919920. Its totient is φ = 102564000.

The previous prime is 205209247. The next prime is 205209337. The reversal of 205209304 is 403902502.

It is a happy number.

205209304 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×205209304² = 84221716896328832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34554 + ... + 40054.

It is an arithmetic number, because the mean of its divisors is an integer number (24057495).

Almost surely, 2^205209304 is an apocalyptic number.

It is an amenable number.

205209304 is a deficient number, since it is larger than the sum of its proper divisors (179710616).

205209304 is a wasteful number, since it uses less digits than its factorization.

205209304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10170 (or 10166 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 205209304 is about 14325.1284112918. The cubic root of 205209304 is about 589.8374578579.

The spelling of 205209304 in words is "two hundred five million, two hundred nine thousand, three hundred four".