205003045 has 16 divisors (see below), whose sum is σ = 267911280. Its totient is φ = 149681664.

The previous prime is 205003037. The next prime is 205003067. The reversal of 205003045 is 540300502.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 7628644 + 197374401 = 2762^2 + 14049^2 .

It is a cyclic number.

It is not a de Polignac number, because 205003045 - 2³ = 205003037 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11934 + ... + 23503.

It is an arithmetic number, because the mean of its divisors is an integer number (16744455).

Almost surely, 2^205003045 is an apocalyptic number.

It is an amenable number.

205003045 is a deficient number, since it is larger than the sum of its proper divisors (62908235).

205003045 is a wasteful number, since it uses less digits than its factorization.

205003045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35544.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 205003045 is about 14317.9273988940. The cubic root of 205003045 is about 589.6397734041.

Adding to 205003045 its reverse (540300502), we get a palindrome (745303547).

The spelling of 205003045 in words is "two hundred five million, three thousand, forty-five".