205130436 has 48 divisors (see below), whose sum is σ = 549892224. Its totient is φ = 58300416.

The previous prime is 205130407. The next prime is 205130467. The reversal of 205130436 is 634031502.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9886 + ... + 22538.

It is an arithmetic number, because the mean of its divisors is an integer number (11456088).

Almost surely, 2^205130436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205130436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274946112).

205130436 is an abundant number, since it is smaller than the sum of its proper divisors (344761788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205130436 is a wasteful number, since it uses less digits than its factorization.

205130436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12860 (or 12858 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 205130436 is about 14322.3753616500. The cubic root of 205130436 is about 589.7618841866.

Adding to 205130436 its reverse (634031502), we get a palindrome (839161938).

The spelling of 205130436 in words is "two hundred five million, one hundred thirty thousand, four hundred thirty-six".