204305231 has 16 divisors (see below), whose sum is σ = 226951200. Its totient is φ = 182694528.

The previous prime is 204305209. The next prime is 204305237. The reversal of 204305231 is 132503402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 204305231 - 2¹⁸ = 204043087 is a prime.

It is a super-2 number, since 2×204305231² = 83481254827926722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204305237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128600 + ... + 130178.

It is an arithmetic number, because the mean of its divisors is an integer number (14184450).

Almost surely, 2^204305231 is an apocalyptic number.

204305231 is a deficient number, since it is larger than the sum of its proper divisors (22645969).

204305231 is a wasteful number, since it uses less digits than its factorization.

204305231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 204305231 is about 14293.5380854427. The cubic root of 204305231 is about 588.9699839522.

Adding to 204305231 its reverse (132503402), we get a palindrome (336808633).

The spelling of 204305231 in words is "two hundred four million, three hundred five thousand, two hundred thirty-one".