204131000521 has 16 divisors (see below), whose sum is σ = 248094368640. Its totient is φ = 163957973760.

The previous prime is 204131000509. The next prime is 204131000527. The reversal of 204131000521 is 125000131402.

It is not a de Polignac number, because 204131000521 - 2⁷ = 204131000393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204131000527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3718135 + ... + 3772636.

It is an arithmetic number, because the mean of its divisors is an integer number (15505898040).

Almost surely, 2^204131000521 is an apocalyptic number.

It is an amenable number.

204131000521 is a deficient number, since it is larger than the sum of its proper divisors (43963368119).

204131000521 is a wasteful number, since it uses less digits than its factorization.

204131000521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7491024.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 204131000521 its reverse (125000131402), we get a palindrome (329131131923).

The spelling of 204131000521 in words is "two hundred four billion, one hundred thirty-one million, five hundred twenty-one", and thus it is an aban number.