205125653 has 4 divisors (see below), whose sum is σ = 215921760. Its totient is φ = 194329548.

The previous prime is 205125643. The next prime is 205125673. The reversal of 205125653 is 356521502.

It is a happy number.

205125653 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 356521502 = 2 ⋅178260751.

It is a cyclic number.

It is not a de Polignac number, because 205125653 - 2⁴ = 205125637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205125643) 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, 5398025 + ... + 5398062.

It is an arithmetic number, because the mean of its divisors is an integer number (53980440).

Almost surely, 2^205125653 is an apocalyptic number.

It is an amenable number.

205125653 is a deficient number, since it is larger than the sum of its proper divisors (10796107).

205125653 is a wasteful number, since it uses less digits than its factorization.

205125653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10796106.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 205125653 is about 14322.2083841843. The cubic root of 205125653 is about 589.7573003503.

The spelling of 205125653 in words is "two hundred five million, one hundred twenty-five thousand, six hundred fifty-three".