204431193 has 6 divisors (see below), whose sum is σ = 295289514. Its totient is φ = 136287456.

The previous prime is 204431189. The next prime is 204431221. The reversal of 204431193 is 391134402.

It can be written as a sum of positive squares in only one way, i.e., 197205849 + 7225344 = 14043^2 + 2688^2 .

It is not a de Polignac number, because 204431193 - 2² = 204431189 is a prime.

It is a super-2 number, since 2×204431193² = 83584225342806498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (204431173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11357280 + ... + 11357297.

It is an arithmetic number, because the mean of its divisors is an integer number (49214919).

Almost surely, 2^204431193 is an apocalyptic number.

It is an amenable number.

204431193 is a deficient number, since it is larger than the sum of its proper divisors (90858321).

204431193 is a wasteful number, since it uses less digits than its factorization.

204431193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22714583 (or 22714580 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 204431193 is about 14297.9436633384. The cubic root of 204431193 is about 589.0909999363.

Adding to 204431193 its reverse (391134402), we get a palindrome (595565595).

The spelling of 204431193 in words is "two hundred four million, four hundred thirty-one thousand, one hundred ninety-three".