521625488 has 20 divisors (see below), whose sum is σ = 1014994188. Its totient is φ = 259691520.

The previous prime is 521625473. The next prime is 521625491. The reversal of 521625488 is 884526125.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28430224 + 493195264 = 5332^2 + 22208^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66233 + ... + 73688.

Almost surely, 2^521625488 is an apocalyptic number.

It is an amenable number.

521625488 is a deficient number, since it is larger than the sum of its proper divisors (493368700).

521625488 is a wasteful number, since it uses less digits than its factorization.

521625488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140162 (or 140156 counting only the distinct ones).

The product of its digits is 153600, while the sum is 41.

The square root of 521625488 is about 22839.1218745380. The cubic root of 521625488 is about 804.9821829062.

The spelling of 521625488 in words is "five hundred twenty-one million, six hundred twenty-five thousand, four hundred eighty-eight".