204011231 has 4 divisors (see below), whose sum is σ = 204558552. Its totient is φ = 203463912.

The previous prime is 204011207. The next prime is 204011233. The reversal of 204011231 is 132110402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132110402 = 2 ⋅66055201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204011231 is a prime.

It is a super-2 number, since 2×204011231² = 83241164748270722, 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 (204011233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273101 + ... + 273846.

It is an arithmetic number, because the mean of its divisors is an integer number (51139638).

Almost surely, 2^204011231 is an apocalyptic number.

204011231 is a deficient number, since it is larger than the sum of its proper divisors (547321).

204011231 is an equidigital number, since it uses as much as digits as its factorization.

204011231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547320.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 204011231 is about 14283.2500153151. The cubic root of 204011231 is about 588.6873344740.

Adding to 204011231 its reverse (132110402), we get a palindrome (336121633).

The spelling of 204011231 in words is "two hundred four million, eleven thousand, two hundred thirty-one".