63521265 has 16 divisors (see below), whose sum is σ = 107612928. Its totient is φ = 31885056.

The previous prime is 63521261. The next prime is 63521273. The reversal of 63521265 is 56212536.

63521265 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 63521265 - 2² = 63521261 is a prime.

It is a super-2 number, since 2×63521265² = 8069902214400450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63521261) 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, 124297 + ... + 124806.

It is an arithmetic number, because the mean of its divisors is an integer number (6725808).

Almost surely, 2^63521265 is an apocalyptic number.

It is an amenable number.

63521265 is a deficient number, since it is larger than the sum of its proper divisors (44091663).

63521265 is a wasteful number, since it uses less digits than its factorization.

63521265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249128.

The product of its digits is 10800, while the sum is 30.

The square root of 63521265 is about 7970.0228983360. The cubic root of 63521265 is about 399.0001381900. Note that the first 3 decimals are identical.

The spelling of 63521265 in words is "sixty-three million, five hundred twenty-one thousand, two hundred sixty-five".