205534312115 has 8 divisors (see below), whose sum is σ = 269063099568. Its totient is φ = 149479499680.

The previous prime is 205534312031. The next prime is 205534312121. The reversal of 205534312115 is 511213435502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205534312115 - 2¹⁰ = 205534311091 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1868493692 + ... + 1868493801.

It is an arithmetic number, because the mean of its divisors is an integer number (33632887446).

Almost surely, 2^205534312115 is an apocalyptic number.

205534312115 is a deficient number, since it is larger than the sum of its proper divisors (63528787453).

205534312115 is a wasteful number, since it uses less digits than its factorization.

205534312115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3736987509.

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 205534312115 its reverse (511213435502), we get a palindrome (716747747617).

The spelling of 205534312115 in words is "two hundred five billion, five hundred thirty-four million, three hundred twelve thousand, one hundred fifteen".