204139172 has 12 divisors (see below), whose sum is σ = 357389340. Its totient is φ = 102027936.

The previous prime is 204139163. The next prime is 204139181. The reversal of 204139172 is 271931402.

It is an interprime number because it is at equal distance from previous prime (204139163) and next prime (204139181).

It can be written as a sum of positive squares in 2 ways, for example, as 70829056 + 133310116 = 8416^2 + 11546^2 .

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, 2354 + ... + 20342.

It is an arithmetic number, because the mean of its divisors is an integer number (29782445).

Almost surely, 2^204139172 is an apocalyptic number.

It is an amenable number.

204139172 is a deficient number, since it is larger than the sum of its proper divisors (153250168).

204139172 is a wasteful number, since it uses less digits than its factorization.

204139172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20830 (or 20828 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 204139172 is about 14287.7280209276. The cubic root of 204139172 is about 588.8103693789.

The spelling of 204139172 in words is "two hundred four million, one hundred thirty-nine thousand, one hundred seventy-two".