205000214091 has 16 divisors (see below), whose sum is σ = 289422802944. Its totient is φ = 128622813824.

The previous prime is 205000214053. The next prime is 205000214113. The reversal of 205000214091 is 190412000502.

It is not a de Polignac number, because 205000214091 - 2²³ = 204991825483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205000210091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1744786 + ... + 1858568.

It is an arithmetic number, because the mean of its divisors is an integer number (18088925184).

Almost surely, 2^205000214091 is an apocalyptic number.

205000214091 is a deficient number, since it is larger than the sum of its proper divisors (84422588853).

205000214091 is a wasteful number, since it uses less digits than its factorization.

205000214091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149130.

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 205000214091 its reverse (190412000502), we get a palindrome (395412214593).

The spelling of 205000214091 in words is "two hundred five billion, two hundred fourteen thousand, ninety-one".