205170220 has 12 divisors (see below), whose sum is σ = 430857504. Its totient is φ = 82068080.

The previous prime is 205170211. The next prime is 205170233. The reversal of 205170220 is 22071502.

205170220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 3 ways as a sum of consecutive naturals, for example, 5129236 + ... + 5129275.

It is an arithmetic number, because the mean of its divisors is an integer number (35904792).

Almost surely, 2^205170220 is an apocalyptic number.

205170220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205170220 is an abundant number, since it is smaller than the sum of its proper divisors (225687284).

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

205170220 is a wasteful number, since it uses less digits than its factorization.

205170220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10258520 (or 10258518 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 205170220 is about 14323.7641700776. The cubic root of 205170220 is about 589.8000088234.

The spelling of 205170220 in words is "two hundred five million, one hundred seventy thousand, two hundred twenty".