205610045 has 8 divisors (see below), whose sum is σ = 247208760. Its totient is φ = 164170240.

The previous prime is 205609997. The next prime is 205610057. The reversal of 205610045 is 540016502.

It can be written as a sum of positive squares in 4 ways, for example, as 51179716 + 154430329 = 7154^2 + 12427^2 .

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

It is not a de Polignac number, because 205610045 - 2¹⁰ = 205609021 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 205610045.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36860 + ... + 42069.

It is an arithmetic number, because the mean of its divisors is an integer number (30901095).

Almost surely, 2^205610045 is an apocalyptic number.

It is an amenable number.

205610045 is a deficient number, since it is larger than the sum of its proper divisors (41598715).

205610045 is an equidigital number, since it uses as much as digits as its factorization.

205610045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79455.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 205610045 is about 14339.1089332636. The cubic root of 205610045 is about 590.2211609831.

Adding to 205610045 its reverse (540016502), we get a palindrome (745626547).

The spelling of 205610045 in words is "two hundred five million, six hundred ten thousand, forty-five".