204243331 has 6 divisors (see below), whose sum is σ = 215559132. Its totient is φ = 193493340.

The previous prime is 204243323. The next prime is 204243337. The reversal of 204243331 is 133342402.

It is a happy number.

It is not a de Polignac number, because 204243331 - 2³ = 204243323 is a prime.

It is a super-2 number, since 2×204243331² = 83430676515951122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204243337) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 282525 + ... + 283246.

It is an arithmetic number, because the mean of its divisors is an integer number (35926522).

Almost surely, 2^204243331 is an apocalyptic number.

204243331 is a deficient number, since it is larger than the sum of its proper divisors (11315801).

204243331 is an equidigital number, since it uses as much as digits as its factorization.

204243331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565809 (or 565790 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 204243331 is about 14291.3726072760. The cubic root of 204243331 is about 588.9104962854.

Adding to 204243331 its reverse (133342402), we get a palindrome (337585733).

The spelling of 204243331 in words is "two hundred four million, two hundred forty-three thousand, three hundred thirty-one".