205140244 has 6 divisors (see below), whose sum is σ = 358995434. Its totient is φ = 102570120.

The previous prime is 205140223. The next prime is 205140251. The reversal of 205140244 is 442041502.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 186650244 + 18490000 = 13662^2 + 4300^2 .

It is a super-3 number, since 3×205140244³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

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, 25642527 + ... + 25642534.

Almost surely, 2^205140244 is an apocalyptic number.

It is an amenable number.

205140244 is a deficient number, since it is larger than the sum of its proper divisors (153855190).

205140244 is a wasteful number, since it uses less digits than its factorization.

205140244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51285065 (or 51285063 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 205140244 is about 14322.7177588613. The cubic root of 205140244 is about 589.7712835594.

Adding to 205140244 its reverse (442041502), we get a palindrome (647181746).

The spelling of 205140244 in words is "two hundred five million, one hundred forty thousand, two hundred forty-four".