205227172 has 6 divisors (see below), whose sum is σ = 359147558. Its totient is φ = 102613584.

The previous prime is 205227131. The next prime is 205227173. The reversal of 205227172 is 271722502.

It can be written as a sum of positive squares in only one way, i.e., 197796096 + 7431076 = 14064^2 + 2726^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 205227172.

It is not an unprimeable number, because it can be changed into a prime (205227173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25653393 + ... + 25653400.

Almost surely, 2^205227172 is an apocalyptic number.

It is an amenable number.

205227172 is a deficient number, since it is larger than the sum of its proper divisors (153920386).

205227172 is a wasteful number, since it uses less digits than its factorization.

205227172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51306797 (or 51306795 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 205227172 is about 14325.7520570475. The cubic root of 205227172 is about 589.8545768182.

Adding to 205227172 its reverse (271722502), we get a palindrome (476949674).

The spelling of 205227172 in words is "two hundred five million, two hundred twenty-seven thousand, one hundred seventy-two".