204531231 has 8 divisors (see below), whose sum is σ = 277179184. Its totient is φ = 134118720.

The previous prime is 204531209. The next prime is 204531241. The reversal of 204531231 is 132135402.

204531231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-204531231 is a prime.

It is a super-2 number, since 2×204531231² = 83666048908750722, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 204531198 and 204531207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204531241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558646 + ... + 559011.

It is an arithmetic number, because the mean of its divisors is an integer number (34647398).

Almost surely, 2^204531231 is an apocalyptic number.

204531231 is a deficient number, since it is larger than the sum of its proper divisors (72647953).

204531231 is a wasteful number, since it uses less digits than its factorization.

204531231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117721.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 204531231 is about 14301.4415706949. The cubic root of 204531231 is about 589.1870744387.

Adding to 204531231 its reverse (132135402), we get a palindrome (336666633).

The spelling of 204531231 in words is "two hundred four million, five hundred thirty-one thousand, two hundred thirty-one".