205105230231 has 96 divisors (see below), whose sum is σ = 329533505280. Its totient is φ = 112422604800.

The previous prime is 205105230217. The next prime is 205105230241. The reversal of 205105230231 is 132032501502.

It is a happy number.

It is not a de Polignac number, because 205105230231 - 2⁷ = 205105230103 is a prime.

It is a super-2 number, since 2×205105230231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205105230241) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26194225 + ... + 26202053.

It is an arithmetic number, because the mean of its divisors is an integer number (3432640680).

Almost surely, 2^205105230231 is an apocalyptic number.

205105230231 is a deficient number, since it is larger than the sum of its proper divisors (124428275049).

205105230231 is a wasteful number, since it uses less digits than its factorization.

205105230231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7985 (or 7968 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 205105230231 its reverse (132032501502), we get a palindrome (337137731733).

The spelling of 205105230231 in words is "two hundred five billion, one hundred five million, two hundred thirty thousand, two hundred thirty-one".