205540202 has 12 divisors (see below), whose sum is σ = 358646850. Its totient is φ = 88088616.

The previous prime is 205540193. The next prime is 205540207. The reversal of 205540202 is 202045502.

It can be written as a sum of positive squares in only one way, i.e., 205320241 + 219961 = 14329^2 + 469^2 .

It is not an unprimeable number, because it can be changed into a prime (205540207) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 1048577 + ... + 1048772.

Almost surely, 2^205540202 is an apocalyptic number.

205540202 is a deficient number, since it is larger than the sum of its proper divisors (153106648).

205540202 is a wasteful number, since it uses less digits than its factorization.

205540202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2097365 (or 2097358 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 205540202 is about 14336.6733240316. The cubic root of 205540202 is about 590.1543233195.

Adding to 205540202 its reverse (202045502), we get a palindrome (407585704).

The spelling of 205540202 in words is "two hundred five million, five hundred forty thousand, two hundred two".