205555238 has 32 divisors (see below), whose sum is σ = 359768640. Its totient is φ = 86261760.

The previous prime is 205555237. The next prime is 205555247. The reversal of 205555238 is 832555502.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 205555198 and 205555207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205555237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266918 + ... + 267686.

It is an arithmetic number, because the mean of its divisors is an integer number (11242770).

Almost surely, 2^205555238 is an apocalyptic number.

205555238 is a deficient number, since it is larger than the sum of its proper divisors (154213402).

205555238 is a wasteful number, since it uses less digits than its factorization.

205555238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152.

The product of its (nonzero) digits is 60000, while the sum is 35.

The square root of 205555238 is about 14337.1977038750. The cubic root of 205555238 is about 590.1687136009.

The spelling of 205555238 in words is "two hundred five million, five hundred fifty-five thousand, two hundred thirty-eight".