205170255 has 24 divisors (see below), whose sum is σ = 358197840. Its totient is φ = 108633600.

The previous prime is 205170233. The next prime is 205170257. The reversal of 205170255 is 552071502.

It is a happy number.

It is not a de Polignac number, because 205170255 - 2¹⁰ = 205169231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205170257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10146 + ... + 22655.

It is an arithmetic number, because the mean of its divisors is an integer number (14924910).

Almost surely, 2^205170255 is an apocalyptic number.

205170255 is a deficient number, since it is larger than the sum of its proper divisors (153027585).

205170255 is a wasteful number, since it uses less digits than its factorization.

205170255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32951 (or 32948 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 205170255 is about 14323.7653918235. The cubic root of 205170255 is about 589.8000423614.

The spelling of 205170255 in words is "two hundred five million, one hundred seventy thousand, two hundred fifty-five".