205543212 has 48 divisors (see below), whose sum is σ = 549249792. Its totient is φ = 58605120.

The previous prime is 205543193. The next prime is 205543223. The reversal of 205543212 is 212345502.

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 15 ways as a sum of consecutive naturals, for example, 43183 + ... + 47705.

It is an arithmetic number, because the mean of its divisors is an integer number (11442704).

Almost surely, 2^205543212 is an apocalyptic number.

It is an amenable number.

205543212 is an abundant number, since it is smaller than the sum of its proper divisors (343706580).

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

205543212 is a wasteful number, since it uses less digits than its factorization.

205543212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5078 (or 5076 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 205543212 is about 14336.7782991856. The cubic root of 205543212 is about 590.1572041117.

Adding to 205543212 its reverse (212345502), we get a palindrome (417888714).

The spelling of 205543212 in words is "two hundred five million, five hundred forty-three thousand, two hundred twelve".