205012005 has 32 divisors (see below), whose sum is σ = 367521408. Its totient is φ = 96710400.

The previous prime is 205012001. The next prime is 205012043. The reversal of 205012005 is 500210502.

It is not a de Polignac number, because 205012005 - 2² = 205012001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205012001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10686 + ... + 22895.

It is an arithmetic number, because the mean of its divisors is an integer number (11485044).

Almost surely, 2^205012005 is an apocalyptic number.

It is an amenable number.

205012005 is a deficient number, since it is larger than the sum of its proper divisors (162509403).

205012005 is a wasteful number, since it uses less digits than its factorization.

205012005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33637.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 205012005 is about 14318.2402899239. The cubic root of 205012005 is about 589.6483636755.

Adding to 205012005 its reverse (500210502), we get a palindrome (705222507).

The spelling of 205012005 in words is "two hundred five million, twelve thousand, five".