204541531 has 2 divisors, whose sum is σ = 204541532. Its totient is φ = 204541530.

The previous prime is 204541523. The next prime is 204541541. The reversal of 204541531 is 135145402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204541531 - 2³ = 204541523 is a prime.

It is a super-2 number, since 2×204541531² = 83674475807647922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204541496 and 204541505.

It is not a weakly prime, because it can be changed into another prime (204541511) 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 as a sum of consecutive naturals, namely, 102270765 + 102270766.

It is an arithmetic number, because the mean of its divisors is an integer number (102270766).

Almost surely, 2^204541531 is an apocalyptic number.

204541531 is a deficient number, since it is larger than the sum of its proper divisors (1).

204541531 is an equidigital number, since it uses as much as digits as its factorization.

204541531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 204541531 is about 14301.8016697198. The cubic root of 204541531 is about 589.1969645746.

Adding to 204541531 its reverse (135145402), we get a palindrome (339686933).

The spelling of 204541531 in words is "two hundred four million, five hundred forty-one thousand, five hundred thirty-one".