204245215 has 4 divisors (see below), whose sum is σ = 245094264. Its totient is φ = 163396168.

The previous prime is 204245201. The next prime is 204245233. The reversal of 204245215 is 512542402.

204245215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 512542402 = 2 ⋅256271201.

It is a cyclic number.

It is not a de Polignac number, because 204245215 - 2⁵ = 204245183 is a prime.

It is a super-2 number, since 2×204245215² = 83432215700792450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204245215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20424517 + ... + 20424526.

It is an arithmetic number, because the mean of its divisors is an integer number (61273566).

Almost surely, 2^204245215 is an apocalyptic number.

204245215 is a deficient number, since it is larger than the sum of its proper divisors (40849049).

204245215 is an equidigital number, since it uses as much as digits as its factorization.

204245215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40849048.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 204245215 is about 14291.4385210167. The cubic root of 204245215 is about 588.9123070405.

Adding to 204245215 its reverse (512542402), we get a palindrome (716787617).

The spelling of 204245215 in words is "two hundred four million, two hundred forty-five thousand, two hundred fifteen".