205731150 has 24 divisors (see below), whose sum is σ = 510213624. Its totient is φ = 54861600.

The previous prime is 205731143. The next prime is 205731151. The reversal of 205731150 is 51137502.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 205731150.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205731151) 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 11 ways as a sum of consecutive naturals, for example, 685621 + ... + 685920.

It is an arithmetic number, because the mean of its divisors is an integer number (21258901).

Almost surely, 2^205731150 is an apocalyptic number.

205731150 is an abundant number, since it is smaller than the sum of its proper divisors (304482474).

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

205731150 is a wasteful number, since it uses less digits than its factorization.

205731150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371556 (or 1371551 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 205731150 is about 14343.3312030365. The cubic root of 205731150 is about 590.3370189811.

Adding to 205731150 its reverse (51137502), we get a palindrome (256868652).

The spelling of 205731150 in words is "two hundred five million, seven hundred thirty-one thousand, one hundred fifty".