205344045 has 16 divisors (see below), whose sum is σ = 365056320. Its totient is φ = 109516752.

The previous prime is 205344019. The next prime is 205344047. The reversal of 205344045 is 540443502.

It is not a de Polignac number, because 205344045 - 2⁶ = 205343981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205344047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 760399 + ... + 760668.

It is an arithmetic number, because the mean of its divisors is an integer number (22816020).

Almost surely, 2^205344045 is an apocalyptic number.

It is an amenable number.

205344045 is a deficient number, since it is larger than the sum of its proper divisors (159712275).

205344045 is a wasteful number, since it uses less digits than its factorization.

205344045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521081 (or 1521075 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 205344045 is about 14329.8305991383. The cubic root of 205344045 is about 589.9665259185.

Adding to 205344045 its reverse (540443502), we get a palindrome (745787547).

The spelling of 205344045 in words is "two hundred five million, three hundred forty-four thousand, forty-five".