205155122205 has 32 divisors (see below), whose sum is σ = 379153001088. Its totient is φ = 93618022400.

The previous prime is 205155122203. The next prime is 205155122219. The reversal of 205155122205 is 502221551502.

It is not a de Polignac number, because 205155122205 - 2¹ = 205155122203 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205155122203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36566736 + ... + 36572345.

It is an arithmetic number, because the mean of its divisors is an integer number (11848531284).

Almost surely, 2^205155122205 is an apocalyptic number.

It is an amenable number.

205155122205 is a deficient number, since it is larger than the sum of its proper divisors (173997878883).

205155122205 is a wasteful number, since it uses less digits than its factorization.

205155122205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73139117.

The product of its (nonzero) digits is 10000, while the sum is 30.

Adding to 205155122205 its reverse (502221551502), we get a palindrome (707376673707).

The spelling of 205155122205 in words is "two hundred five billion, one hundred fifty-five million, one hundred twenty-two thousand, two hundred five".