204242252515 has 48 divisors (see below), whose sum is σ = 288266273280. Its totient is φ = 138507774720.

The previous prime is 204242252507. The next prime is 204242252569. The reversal of 204242252515 is 515252242402.

It is not a de Polignac number, because 204242252515 - 2³ = 204242252507 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8082921 + ... + 8108149.

It is an arithmetic number, because the mean of its divisors is an integer number (6005547360).

Almost surely, 2^204242252515 is an apocalyptic number.

204242252515 is a deficient number, since it is larger than the sum of its proper divisors (84024020765).

204242252515 is a wasteful number, since it uses less digits than its factorization.

204242252515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25612 (or 25605 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 34.

Adding to 204242252515 its reverse (515252242402), we get a palindrome (719494494917).

The spelling of 204242252515 in words is "two hundred four billion, two hundred forty-two million, two hundred fifty-two thousand, five hundred fifteen".