205000445 has 8 divisors (see below), whose sum is σ = 264923736. Its totient is φ = 151384896.

The previous prime is 205000381. The next prime is 205000457. The reversal of 205000445 is 544000502.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10621081 + 194379364 = 3259^2 + 13942^2 .

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

It is not a de Polignac number, because 205000445 - 2⁶ = 205000381 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 7 ways as a sum of consecutive naturals, for example, 1576862 + ... + 1576991.

It is an arithmetic number, because the mean of its divisors is an integer number (33115467).

Almost surely, 2^205000445 is an apocalyptic number.

It is an amenable number.

205000445 is a deficient number, since it is larger than the sum of its proper divisors (59923291).

205000445 is a wasteful number, since it uses less digits than its factorization.

205000445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3153871.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 205000445 is about 14317.8366033420. The cubic root of 205000445 is about 589.6372806445.

Adding to 205000445 its reverse (544000502), we get a palindrome (749000947).

The spelling of 205000445 in words is "two hundred five million, four hundred forty-five", and thus it is an aban number.