204115305242 has 4 divisors (see below), whose sum is σ = 306172957866. Its totient is φ = 102057652620.

The previous prime is 204115305197. The next prime is 204115305253. The reversal of 204115305242 is 242503511402.

204115305242 is digitally balanced in base 3, 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: 242503511402 = 2 ⋅121251755701.

It can be written as a sum of positive squares in only one way, i.e., 175618826761 + 28496478481 = 419069^2 + 168809^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51028826309 + ... + 51028826312.

Almost surely, 2^204115305242 is an apocalyptic number.

204115305242 is a deficient number, since it is larger than the sum of its proper divisors (102057652624).

204115305242 is a wasteful number, since it uses less digits than its factorization.

204115305242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102057652623.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 204115305242 its reverse (242503511402), we get a palindrome (446618816644).

The spelling of 204115305242 in words is "two hundred four billion, one hundred fifteen million, three hundred five thousand, two hundred forty-two".