205344136 has 8 divisors (see below), whose sum is σ = 385020270. Its totient is φ = 102672064.

The previous prime is 205344107. The next prime is 205344137. The reversal of 205344136 is 631443502.

It can be written as a sum of positive squares in only one way, i.e., 172922500 + 32421636 = 13150^2 + 5694^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (205344137) by changing a digit.

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 as a sum of consecutive naturals, namely, 12834001 + ... + 12834016.

Almost surely, 2^205344136 is an apocalyptic number.

It is an amenable number.

205344136 is a deficient number, since it is larger than the sum of its proper divisors (179676134).

205344136 is a wasteful number, since it uses less digits than its factorization.

205344136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25668023 (or 25668019 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 205344136 is about 14329.8337743325. The cubic root of 205344136 is about 589.9666130681.

Adding to 205344136 its reverse (631443502), we get a palindrome (836787638).

The spelling of 205344136 in words is "two hundred five million, three hundred forty-four thousand, one hundred thirty-six".