204102135215 has 32 divisors (see below), whose sum is σ = 269926836480. Its totient is φ = 146922969600.

The previous prime is 204102135197. The next prime is 204102135239. The reversal of 204102135215 is 512531201402.

It is not a de Polignac number, because 204102135215 - 2¹⁶ = 204102069679 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2490167 + ... + 2570823.

It is an arithmetic number, because the mean of its divisors is an integer number (8435213640).

Almost surely, 2^204102135215 is an apocalyptic number.

204102135215 is a deficient number, since it is larger than the sum of its proper divisors (65824701265).

204102135215 is a wasteful number, since it uses less digits than its factorization.

204102135215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81143.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 204102135215 its reverse (512531201402), we get a palindrome (716633336617).

The spelling of 204102135215 in words is "two hundred four billion, one hundred two million, one hundred thirty-five thousand, two hundred fifteen".