204320031 has 16 divisors (see below), whose sum is σ = 282420864. Its totient is φ = 131285664.

The previous prime is 204320027. The next prime is 204320069. The reversal of 204320031 is 130023402.

It is not a de Polignac number, because 204320031 - 2² = 204320027 is a prime.

It is a super-2 number, since 2×204320031² = 83493350135681922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204320731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3276 + ... + 20478.

It is an arithmetic number, because the mean of its divisors is an integer number (17651304).

Almost surely, 2^204320031 is an apocalyptic number.

204320031 is a deficient number, since it is larger than the sum of its proper divisors (78100833).

204320031 is a wasteful number, since it uses less digits than its factorization.

204320031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17350.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 204320031 is about 14294.0557925314. The cubic root of 204320031 is about 588.9842053947.

Adding to 204320031 its reverse (130023402), we get a palindrome (334343433).

It can be divided in two parts, 2043200 and 31, that added together give a triangular number (2043231 = T₂₀₂₁).

The spelling of 204320031 in words is "two hundred four million, three hundred twenty thousand, thirty-one".