204130031 has 12 divisors (see below), whose sum is σ = 237800808. Its totient is φ = 174715632.

The previous prime is 204130027. The next prime is 204130049. The reversal of 204130031 is 130031402.

It is not a de Polignac number, because 204130031 - 2² = 204130027 is a prime.

It is a super-2 number, since 2×204130031² = 83338139112121922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204129988 and 204130015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204130081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36440 + ... + 41666.

It is an arithmetic number, because the mean of its divisors is an integer number (19816734).

Almost surely, 2^204130031 is an apocalyptic number.

204130031 is a deficient number, since it is larger than the sum of its proper divisors (33670777).

204130031 is an equidigital number, since it uses as much as digits as its factorization.

204130031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6038 (or 6031 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 204130031 is about 14287.4081274387. The cubic root of 204130031 is about 588.8015806102.

Adding to 204130031 its reverse (130031402), we get a palindrome (334161433).

The spelling of 204130031 in words is "two hundred four million, one hundred thirty thousand, thirty-one".