204342431 has 16 divisors (see below), whose sum is σ = 221374944. Its totient is φ = 187920384.

The previous prime is 204342377. The next prime is 204342443. The reversal of 204342431 is 134243402.

It is a cyclic number.

It is not a de Polignac number, because 204342431 - 2⁶ = 204342367 is a prime.

It is a super-2 number, since 2×204342431² = 83511658213979522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204342397 and 204342406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204342461) 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 15 ways as a sum of consecutive naturals, for example, 136121 + ... + 137613.

It is an arithmetic number, because the mean of its divisors is an integer number (13835934).

Almost surely, 2^204342431 is an apocalyptic number.

204342431 is a deficient number, since it is larger than the sum of its proper divisors (17032513).

204342431 is a wasteful number, since it uses less digits than its factorization.

204342431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 204342431 is about 14294.8393135425. The cubic root of 204342431 is about 589.0057284339.

Adding to 204342431 its reverse (134243402), we get a palindrome (338585833).

The spelling of 204342431 in words is "two hundred four million, three hundred forty-two thousand, four hundred thirty-one".