205334138 has 4 divisors (see below), whose sum is σ = 308001210. Its totient is φ = 102667068.

The previous prime is 205334131. The next prime is 205334141. The reversal of 205334138 is 831433502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 173264569 + 32069569 = 13163^2 + 5663^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 205334138.

It is not an unprimeable number, because it can be changed into a prime (205334131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51333533 + ... + 51333536.

Almost surely, 2^205334138 is an apocalyptic number.

205334138 is a deficient number, since it is larger than the sum of its proper divisors (102667072).

205334138 is a wasteful number, since it uses less digits than its factorization.

205334138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102667071.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 205334138 is about 14329.4849174700. The cubic root of 205334138 is about 589.9570379519.

The spelling of 205334138 in words is "two hundred five million, three hundred thirty-four thousand, one hundred thirty-eight".