205606245 has 64 divisors (see below), whose sum is σ = 378362880. Its totient is φ = 95007744.

The previous prime is 205606243. The next prime is 205606249. The reversal of 205606245 is 542606502.

It is not a de Polignac number, because 205606245 - 2¹ = 205606243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205606241) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 560052 + ... + 560418.

It is an arithmetic number, because the mean of its divisors is an integer number (5911920).

Almost surely, 2^205606245 is an apocalyptic number.

It is an amenable number.

205606245 is a deficient number, since it is larger than the sum of its proper divisors (172756635).

205606245 is a wasteful number, since it uses less digits than its factorization.

205606245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 205606245 is about 14338.9764279045. The cubic root of 205606245 is about 590.2175248860.

The spelling of 205606245 in words is "two hundred five million, six hundred six thousand, two hundred forty-five".