521225504 has 24 divisors (see below), whose sum is σ = 1026689580. Its totient is φ = 260478976.

The previous prime is 521225503. The next prime is 521225513. The reversal of 521225504 is 405522125.

It can be written as a sum of positive squares in 2 ways, for example, as 490533904 + 30691600 = 22148^2 + 5540^2 .

It is not an unprimeable number, because it can be changed into a prime (521225503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96212 + ... + 101484.

Almost surely, 2^521225504 is an apocalyptic number.

It is an amenable number.

521225504 is a deficient number, since it is larger than the sum of its proper divisors (505464076).

521225504 is a wasteful number, since it uses less digits than its factorization.

521225504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8372 (or 8364 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 521225504 is about 22830.3636414316. The cubic root of 521225504 is about 804.7763760362.

Adding to 521225504 its reverse (405522125), we get a palindrome (926747629).

The spelling of 521225504 in words is "five hundred twenty-one million, two hundred twenty-five thousand, five hundred four".