205125133 has 4 divisors (see below), whose sum is σ = 205269120. Its totient is φ = 204981148.

The previous prime is 205125131. The next prime is 205125139. The reversal of 205125133 is 331521502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 205125133 - 2¹ = 205125131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205125131) 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, 69835 + ... + 72712.

It is an arithmetic number, because the mean of its divisors is an integer number (51317280).

Almost surely, 2^205125133 is an apocalyptic number.

It is an amenable number.

205125133 is a deficient number, since it is larger than the sum of its proper divisors (143987).

205125133 is a wasteful number, since it uses less digits than its factorization.

205125133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143986.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 205125133 is about 14322.1902305478. The cubic root of 205125133 is about 589.7568019987.

Adding to 205125133 its reverse (331521502), we get a palindrome (536646635).

The spelling of 205125133 in words is "two hundred five million, one hundred twenty-five thousand, one hundred thirty-three".