204215342135 has 16 divisors (see below), whose sum is σ = 280751534400. Its totient is φ = 139690987776.

The previous prime is 204215342117. The next prime is 204215342159. The reversal of 204215342135 is 531243512402.

It is a cyclic number.

It is not a de Polignac number, because 204215342135 - 2³⁴ = 187035472951 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7118600 + ... + 7147229.

It is an arithmetic number, because the mean of its divisors is an integer number (17546970900).

Almost surely, 2^204215342135 is an apocalyptic number.

204215342135 is a deficient number, since it is larger than the sum of its proper divisors (76536192265).

204215342135 is a wasteful number, since it uses less digits than its factorization.

204215342135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14266250.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 204215342135 its reverse (531243512402), we get a palindrome (735458854537).

The spelling of 204215342135 in words is "two hundred four billion, two hundred fifteen million, three hundred forty-two thousand, one hundred thirty-five".