204542431 has 2 divisors, whose sum is σ = 204542432. Its totient is φ = 204542430.

The previous prime is 204542417. The next prime is 204542573. The reversal of 204542431 is 134245402.

It is a happy number.

204542431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204542431 - 2¹¹ = 204540383 is a prime.

It is a super-2 number, since 2×204542431² = 83675212158779522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204542396 and 204542405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204542411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102271215 + 102271216.

It is an arithmetic number, because the mean of its divisors is an integer number (102271216).

Almost surely, 2^204542431 is an apocalyptic number.

204542431 is a deficient number, since it is larger than the sum of its proper divisors (1).

204542431 is an equidigital number, since it uses as much as digits as its factorization.

204542431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 204542431 is about 14301.8331342524. The cubic root of 204542431 is about 589.1978287454.

Adding to 204542431 its reverse (134245402), we get a palindrome (338787833).

The spelling of 204542431 in words is "two hundred four million, five hundred forty-two thousand, four hundred thirty-one".