205231285 has 8 divisors (see below), whose sum is σ = 281460096. Its totient is φ = 140730000.

The previous prime is 205231249. The next prime is 205231291. The reversal of 205231285 is 582132502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205231285 - 2¹¹ = 205229237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2931841 + ... + 2931910.

It is an arithmetic number, because the mean of its divisors is an integer number (35182512).

Almost surely, 2^205231285 is an apocalyptic number.

It is an amenable number.

205231285 is a deficient number, since it is larger than the sum of its proper divisors (76228811).

205231285 is an equidigital number, since it uses as much as digits as its factorization.

205231285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5863763.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 205231285 is about 14325.8956090012. The cubic root of 205231285 is about 589.8585172576.

Adding to 205231285 its reverse (582132502), we get a palindrome (787363787).

The spelling of 205231285 in words is "two hundred five million, two hundred thirty-one thousand, two hundred eighty-five".