205113311210115 has 72 divisors (see below), whose sum is σ = 446615871103584. Its totient is φ = 85241895552000.

The previous prime is 205113311210039. The next prime is 205113311210177. The reversal of 205113311210115 is 511012113311502.

205113311210115 is a `hidden beast` number, since 2 + 0 + 5 + 1 + 1 + 331 + 1 + 210 + 115 = 666.

It is not a de Polignac number, because 205113311210115 - 2¹⁰ = 205113311209091 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2690678286 + ... + 2690754515.

It is an arithmetic number, because the mean of its divisors is an integer number (6202998209772).

Almost surely, 2^{205113311210115} is an apocalyptic number.

205113311210115 is an abundant number, since it is smaller than the sum of its proper divisors (241502559893469).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205113311210115 is a wasteful number, since it uses less digits than its factorization.

205113311210115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5381432841 (or 5381432827 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

Adding to 205113311210115 its reverse (511012113311502), we get a palindrome (716125424521617).

The spelling of 205113311210115 in words is "two hundred five trillion, one hundred thirteen billion, three hundred eleven million, two hundred ten thousand, one hundred fifteen".