204205431 has 32 divisors (see below), whose sum is σ = 292331520. Its totient is φ = 126507744.

The previous prime is 204205381. The next prime is 204205433. The reversal of 204205431 is 134502402.

It is not a de Polignac number, because 204205431 - 2¹⁵ = 204172663 is a prime.

It is a super-2 number, since 2×204205431² = 83399716099791522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204205398 and 204205407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204205433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 419070 + ... + 419556.

It is an arithmetic number, because the mean of its divisors is an integer number (9135360).

Almost surely, 2^204205431 is an apocalyptic number.

204205431 is a deficient number, since it is larger than the sum of its proper divisors (88126089).

204205431 is a wasteful number, since it uses less digits than its factorization.

204205431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 204205431 is about 14290.0465709528. The cubic root of 204205431 is about 588.8740673709.

Adding to 204205431 its reverse (134502402), we get a palindrome (338707833).

The spelling of 204205431 in words is "two hundred four million, two hundred five thousand, four hundred thirty-one".