205125045 has 32 divisors (see below), whose sum is σ = 347068800. Its totient is φ = 103163904.

The previous prime is 205125013. The next prime is 205125059. The reversal of 205125045 is 540521502.

It is a happy number.

It is not a de Polignac number, because 205125045 - 2⁵ = 205125013 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64861 + ... + 67949.

It is an arithmetic number, because the mean of its divisors is an integer number (10845900).

Almost surely, 2^205125045 is an apocalyptic number.

It is an amenable number.

205125045 is a deficient number, since it is larger than the sum of its proper divisors (141943755).

205125045 is a wasteful number, since it uses less digits than its factorization.

205125045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3349.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 205125045 is about 14322.1871583917. The cubic root of 205125045 is about 589.7567176622.

Adding to 205125045 its reverse (540521502), we get a palindrome (745646547).

It can be divided in two parts, 205 and 125045, that added together give a triangular number (125250 = T₅₀₀).

The spelling of 205125045 in words is "two hundred five million, one hundred twenty-five thousand, forty-five".