205056534 has 16 divisors (see below), whose sum is σ = 414722160. Its totient is φ = 67584000.

The previous prime is 205056497. The next prime is 205056557. The reversal of 205056534 is 435650502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191467 + ... + 192534.

It is an arithmetic number, because the mean of its divisors is an integer number (25920135).

Almost surely, 2^205056534 is an apocalyptic number.

205056534 is an abundant number, since it is smaller than the sum of its proper divisors (209665626).

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

205056534 is a wasteful number, since it uses less digits than its factorization.

205056534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384095.

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 205056534 is about 14319.7951800995. The cubic root of 205056534 is about 589.6910515029.

The spelling of 205056534 in words is "two hundred five million, fifty-six thousand, five hundred thirty-four".