204434031 has 4 divisors (see below), whose sum is σ = 272578712. Its totient is φ = 136289352.

The previous prime is 204434029. The next prime is 204434071. The reversal of 204434031 is 130434402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 204434031 - 2¹ = 204434029 is a prime.

It is a super-2 number, since 2×204434031² = 83586546061817922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204433989 and 204434007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204434071) 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, 34072336 + ... + 34072341.

It is an arithmetic number, because the mean of its divisors is an integer number (68144678).

Almost surely, 2^204434031 is an apocalyptic number.

204434031 is a deficient number, since it is larger than the sum of its proper divisors (68144681).

204434031 is an equidigital number, since it uses as much as digits as its factorization.

204434031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68144680.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 204434031 is about 14298.0429080347. The cubic root of 204434031 is about 589.0937259269.

Adding to 204434031 its reverse (130434402), we get a palindrome (334868433).

The spelling of 204434031 in words is "two hundred four million, four hundred thirty-four thousand, thirty-one".