204133231 has 4 divisors (see below), whose sum is σ = 204410200. Its totient is φ = 203856264.

The previous prime is 204133183. The next prime is 204133243. The reversal of 204133231 is 132331402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204133231 - 2¹³ = 204125039 is a prime.

It is a super-2 number, since 2×204133231² = 83340751996998722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204133199 and 204133208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204133931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137376 + ... + 138853.

It is an arithmetic number, because the mean of its divisors is an integer number (51102550).

Almost surely, 2^204133231 is an apocalyptic number.

204133231 is a deficient number, since it is larger than the sum of its proper divisors (276969).

204133231 is an equidigital number, since it uses as much as digits as its factorization.

204133231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276968.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 204133231 is about 14287.5201137216. The cubic root of 204133231 is about 588.8046573340.

Adding to 204133231 its reverse (132331402), we get a palindrome (336464633).

The spelling of 204133231 in words is "two hundred four million, one hundred thirty-three thousand, two hundred thirty-one".