205755538 has 16 divisors (see below), whose sum is σ = 314667360. Its totient is φ = 100875456.

The previous prime is 205755533. The next prime is 205755569. The reversal of 205755538 is 835557502.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 205755538.

It is not an unprimeable number, because it can be changed into a prime (205755533) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 49081 + ... + 53107.

It is an arithmetic number, because the mean of its divisors is an integer number (19666710).

Almost surely, 2^205755538 is an apocalyptic number.

205755538 is a deficient number, since it is larger than the sum of its proper divisors (108911822).

205755538 is a wasteful number, since it uses less digits than its factorization.

205755538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4521.

The product of its (nonzero) digits is 210000, while the sum is 40.

The square root of 205755538 is about 14344.1813290268. The cubic root of 205755538 is about 590.3603448449.

The spelling of 205755538 in words is "two hundred five million, seven hundred fifty-five thousand, five hundred thirty-eight".