205012215 has 40 divisors (see below), whose sum is σ = 374476608. Its totient is φ = 107265600.

The previous prime is 205012141. The next prime is 205012217. The reversal of 205012215 is 512210502.

It is a de Polignac number, because none of the positive numbers 2^k-205012215 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205012217) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 16690 + ... + 26240.

Almost surely, 2^205012215 is an apocalyptic number.

205012215 is a deficient number, since it is larger than the sum of its proper divisors (169464393).

205012215 is an equidigital number, since it uses as much as digits as its factorization.

205012215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9621 (or 9612 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 205012215 is about 14318.2476232254. The cubic root of 205012215 is about 589.6485650070.

Adding to 205012215 its reverse (512210502), we get a palindrome (717222717).

The spelling of 205012215 in words is "two hundred five million, twelve thousand, two hundred fifteen".