205504212 has 12 divisors (see below), whose sum is σ = 479509856. Its totient is φ = 68501400.

The previous prime is 205504207. The next prime is 205504213. The reversal of 205504212 is 212405502.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×205504212² = 84463962299481888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205504213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8562664 + ... + 8562687.

Almost surely, 2^205504212 is an apocalyptic number.

It is an amenable number.

205504212 is an abundant number, since it is smaller than the sum of its proper divisors (274005644).

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

205504212 is a wasteful number, since it uses less digits than its factorization.

205504212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17125358 (or 17125356 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 205504212 is about 14335.4180964491. The cubic root of 205504212 is about 590.1198760537.

Adding to 205504212 its reverse (212405502), we get a palindrome (417909714).

The spelling of 205504212 in words is "two hundred five million, five hundred four thousand, two hundred twelve".