205675172 has 6 divisors (see below), whose sum is σ = 359931558. Its totient is φ = 102837584.

The previous prime is 205675069. The next prime is 205675189. The reversal of 205675172 is 271576502.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 205234276 + 440896 = 14326^2 + 664^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25709393 + ... + 25709400.

It is an arithmetic number, because the mean of its divisors is an integer number (59988593).

Almost surely, 2^205675172 is an apocalyptic number.

It is an amenable number.

205675172 is a deficient number, since it is larger than the sum of its proper divisors (154256386).

205675172 is a wasteful number, since it uses less digits than its factorization.

205675172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51418797 (or 51418795 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 205675172 is about 14341.3797104742. The cubic root of 205675172 is about 590.2834719396.

The spelling of 205675172 in words is "two hundred five million, six hundred seventy-five thousand, one hundred seventy-two".