204132431 has 4 divisors (see below), whose sum is σ = 204162072. Its totient is φ = 204102792.

The previous prime is 204132407. The next prime is 204132443. The reversal of 204132431 is 134231402.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 204132431 - 2¹⁴ = 204116047 is a prime.

It is a super-2 number, since 2×204132431² = 83340098771939522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204132491) 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 3 ways as a sum of consecutive naturals, for example, 1505 + ... + 20261.

It is an arithmetic number, because the mean of its divisors is an integer number (51040518).

Almost surely, 2^204132431 is an apocalyptic number.

204132431 is a deficient number, since it is larger than the sum of its proper divisors (29641).

204132431 is a wasteful number, since it uses less digits than its factorization.

204132431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29640.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 204132431 is about 14287.4921172332. The cubic root of 204132431 is about 588.8038881561.

Adding to 204132431 its reverse (134231402), we get a palindrome (338363833).

The spelling of 204132431 in words is "two hundred four million, one hundred thirty-two thousand, four hundred thirty-one".