63521163 has 12 divisors (see below), whose sum is σ = 97150248. Its totient is φ = 39856320.

The previous prime is 63521137. The next prime is 63521179. The reversal of 63521163 is 36112536.

63521163 is a `hidden beast` number, since 635 + 21 + 1 + 6 + 3 = 666.

It is not a de Polignac number, because 63521163 - 2⁶ = 63521099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63521663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207433 + ... + 207738.

It is an arithmetic number, because the mean of its divisors is an integer number (8095854).

Almost surely, 2^63521163 is an apocalyptic number.

63521163 is a deficient number, since it is larger than the sum of its proper divisors (33629085).

63521163 is a wasteful number, since it uses less digits than its factorization.

63521163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415194 (or 415191 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 63521163 is about 7970.0164993556. The cubic root of 63521163 is about 398.9999246236. Note that the first 4 decimals are identical.

Adding to 63521163 its reverse (36112536), we get a palindrome (99633699).

The spelling of 63521163 in words is "sixty-three million, five hundred twenty-one thousand, one hundred sixty-three".