205606045 has 8 divisors (see below), whose sum is σ = 248091480. Its totient is φ = 163575360.

The previous prime is 205606013. The next prime is 205606057. The reversal of 205606045 is 540606502.

It can be written as a sum of positive squares in 4 ways, for example, as 1058841 + 204547204 = 1029^2 + 14302^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205606045 - 2⁵ = 205606013 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112690 + ... + 114499.

It is an arithmetic number, because the mean of its divisors is an integer number (31011435).

Almost surely, 2^205606045 is an apocalyptic number.

It is an amenable number.

205606045 is a deficient number, since it is larger than the sum of its proper divisors (42485435).

205606045 is a wasteful number, since it uses less digits than its factorization.

205606045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227375.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 205606045 is about 14338.9694539043. The cubic root of 205606045 is about 590.2173335113.

It can be divided in two parts, 20 and 5606045, that added together give a palindrome (5606065).

The spelling of 205606045 in words is "two hundred five million, six hundred six thousand, forty-five".