205143124 has 12 divisors (see below), whose sum is σ = 359604000. Its totient is φ = 102399128.

The previous prime is 205143121. The next prime is 205143149. The reversal of 205143124 is 421341502.

It is a junction number, because it is equal to n+sod(n) for n = 205143095 and 205143104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205143121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40414 + ... + 45205.

It is an arithmetic number, because the mean of its divisors is an integer number (29967000).

Almost surely, 2^205143124 is an apocalyptic number.

It is an amenable number.

205143124 is a deficient number, since it is larger than the sum of its proper divisors (154460876).

205143124 is a wasteful number, since it uses less digits than its factorization.

205143124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86222 (or 86220 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 205143124 is about 14322.8182980864. The cubic root of 205143124 is about 589.7740435141.

Adding to 205143124 its reverse (421341502), we get a palindrome (626484626).

The spelling of 205143124 in words is "two hundred five million, one hundred forty-three thousand, one hundred twenty-four".