204031431 has 24 divisors (see below), whose sum is σ = 309738000. Its totient is φ = 129257856.

The previous prime is 204031409. The next prime is 204031439. The reversal of 204031431 is 134130402.

204031431 is a `hidden beast` number, since 204 + 0 + 31 + 431 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-204031431 is a prime.

It is a super-2 number, since 2×204031431² = 83257649671815522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204031439) 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, 7195 + ... + 21443.

It is an arithmetic number, because the mean of its divisors is an integer number (12905750).

Almost surely, 2^204031431 is an apocalyptic number.

204031431 is a deficient number, since it is larger than the sum of its proper divisors (105706569).

204031431 is a wasteful number, since it uses less digits than its factorization.

204031431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14335 (or 14332 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 204031431 is about 14283.9571197900. The cubic root of 204031431 is about 588.7067632927.

Adding to 204031431 its reverse (134130402), we get a palindrome (338161833).

The spelling of 204031431 in words is "two hundred four million, thirty-one thousand, four hundred thirty-one".