205305245 has 16 divisors (see below), whose sum is σ = 263354112. Its totient is φ = 153267840.

The previous prime is 205305229. The next prime is 205305257. The reversal of 205305245 is 542503502.

It is not a de Polignac number, because 205305245 - 2⁴ = 205305229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17057 + ... + 26486.

It is an arithmetic number, because the mean of its divisors is an integer number (16459632).

Almost surely, 2^205305245 is an apocalyptic number.

It is an amenable number.

205305245 is a deficient number, since it is larger than the sum of its proper divisors (58048867).

205305245 is a wasteful number, since it uses less digits than its factorization.

205305245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43612.

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 205305245 is about 14328.4767159667. The cubic root of 205305245 is about 589.9293652871.

Adding to 205305245 its reverse (542503502), we get a palindrome (747808747).

The spelling of 205305245 in words is "two hundred five million, three hundred five thousand, two hundred forty-five".