205612172 has 12 divisors (see below), whose sum is σ = 361256616. Its totient is φ = 102396000.

The previous prime is 205612139. The next prime is 205612177. The reversal of 205612172 is 271216502.

It is not an unprimeable number, because it can be changed into a prime (205612177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101393 + ... + 103400.

It is an arithmetic number, because the mean of its divisors is an integer number (30104718).

Almost surely, 2^205612172 is an apocalyptic number.

It is an amenable number.

205612172 is a deficient number, since it is larger than the sum of its proper divisors (155644444).

205612172 is a wasteful number, since it uses less digits than its factorization.

205612172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205048 (or 205046 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 205612172 is about 14339.1831008604. The cubic root of 205612172 is about 590.2231962210.

Adding to 205612172 its reverse (271216502), we get a palindrome (476828674).

The spelling of 205612172 in words is "two hundred five million, six hundred twelve thousand, one hundred seventy-two".