204131011 has 24 divisors (see below), whose sum is σ = 244532736. Its totient is φ = 169822800.

The previous prime is 204131009. The next prime is 204131017. The reversal of 204131011 is 110131402.

It is not a de Polignac number, because 204131011 - 2¹ = 204131009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204130982 and 204131000.

It is not an unprimeable number, because it can be changed into a prime (204131017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 347460 + ... + 348046.

It is an arithmetic number, because the mean of its divisors is an integer number (10188864).

Almost surely, 2^204131011 is an apocalyptic number.

204131011 is a deficient number, since it is larger than the sum of its proper divisors (40401725).

204131011 is a wasteful number, since it uses less digits than its factorization.

204131011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799 (or 792 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 204131011 is about 14287.4424233311. The cubic root of 204131011 is about 588.8025228603.

Adding to 204131011 its reverse (110131402), we get a palindrome (314262413).

The spelling of 204131011 in words is "two hundred four million, one hundred thirty-one thousand, eleven".