63487521 has 12 divisors (see below), whose sum is σ = 95691648. Its totient is φ = 40484664.

The previous prime is 63487517. The next prime is 63487547. The reversal of 63487521 is 12578436.

63487521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 63487521 - 2² = 63487517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63487511) 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 11 ways as a sum of consecutive naturals, for example, 153145 + ... + 153558.

It is an arithmetic number, because the mean of its divisors is an integer number (7974304).

Almost surely, 2^63487521 is an apocalyptic number.

It is an amenable number.

63487521 is a deficient number, since it is larger than the sum of its proper divisors (32204127).

63487521 is a wasteful number, since it uses less digits than its factorization.

63487521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306732 (or 306729 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 63487521 is about 7967.9056846828. The cubic root of 63487521 is about 398.9294729019.

The spelling of 63487521 in words is "sixty-three million, four hundred eighty-seven thousand, five hundred twenty-one".