204532521 has 16 divisors (see below), whose sum is σ = 274752000. Its totient is φ = 135339008.

The previous prime is 204532507. The next prime is 204532543. The reversal of 204532521 is 125235402.

It is a cyclic number.

It is not a de Polignac number, because 204532521 - 2¹⁰ = 204531497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204532491 and 204532500.

It is not an unprimeable number, because it can be changed into a prime (204532561) 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, 426760 + ... + 427238.

It is an arithmetic number, because the mean of its divisors is an integer number (17172000).

Almost surely, 2^204532521 is an apocalyptic number.

It is an amenable number.

204532521 is a deficient number, since it is larger than the sum of its proper divisors (70219479).

204532521 is a wasteful number, since it uses less digits than its factorization.

204532521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 204532521 is about 14301.4866709724. The cubic root of 204532521 is about 589.1883131244.

Adding to 204532521 its reverse (125235402), we get a palindrome (329767923).

The spelling of 204532521 in words is "two hundred four million, five hundred thirty-two thousand, five hundred twenty-one".