205101172 has 24 divisors (see below), whose sum is σ = 363031200. Its totient is φ = 101384736.

The previous prime is 205101167. The next prime is 205101187. The reversal of 205101172 is 271101502.

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, 162279 + ... + 163537.

It is an arithmetic number, because the mean of its divisors is an integer number (15126300).

Almost surely, 2^205101172 is an apocalyptic number.

It is an amenable number.

205101172 is a deficient number, since it is larger than the sum of its proper divisors (157930028).

205101172 is a wasteful number, since it uses less digits than its factorization.

205101172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695 (or 1693 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 205101172 is about 14321.3537069650. The cubic root of 205101172 is about 589.7338376212.

Adding to 205101172 its reverse (271101502), we get a palindrome (476202674).

The spelling of 205101172 in words is "two hundred five million, one hundred one thousand, one hundred seventy-two".