205138267 has 4 divisors (see below), whose sum is σ = 206179776. Its totient is φ = 204096760.

The previous prime is 205138229. The next prime is 205138289. The reversal of 205138267 is 762831502.

It is a happy number.

205138267 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 205138267 - 2⁷ = 205138139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205138217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520459 + ... + 520852.

It is an arithmetic number, because the mean of its divisors is an integer number (51544944).

Almost surely, 2^205138267 is an apocalyptic number.

205138267 is a deficient number, since it is larger than the sum of its proper divisors (1041509).

205138267 is a wasteful number, since it uses less digits than its factorization.

205138267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041508.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 205138267 is about 14322.6487424638. The cubic root of 205138267 is about 589.7693889506.

Adding to 205138267 its reverse (762831502), we get a palindrome (967969769).

The spelling of 205138267 in words is "two hundred five million, one hundred thirty-eight thousand, two hundred sixty-seven".