205055506 has 4 divisors (see below), whose sum is σ = 307583262. Its totient is φ = 102527752.

The previous prime is 205055489. The next prime is 205055507. The reversal of 205055506 is 605550502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 204747481 + 308025 = 14309^2 + 555^2 .

It is not an unprimeable number, because it can be changed into a prime (205055507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51263875 + ... + 51263878.

Almost surely, 2^205055506 is an apocalyptic number.

205055506 is a deficient number, since it is larger than the sum of its proper divisors (102527756).

205055506 is a wasteful number, since it uses less digits than its factorization.

205055506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102527755.

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

The square root of 205055506 is about 14319.7592856863. The cubic root of 205055506 is about 589.6900660780.

The spelling of 205055506 in words is "two hundred five million, fifty-five thousand, five hundred six".