63521161 has 16 divisors (see below), whose sum is σ = 73209600. Its totient is φ = 54507600.

The previous prime is 63521137. The next prime is 63521179. The reversal of 63521161 is 16112536.

It is a cyclic number.

It is not a de Polignac number, because 63521161 - 2⁷ = 63521033 is a prime.

It is a Duffinian number.

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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102310 + ... + 102928.

It is an arithmetic number, because the mean of its divisors is an integer number (4575600).

Almost surely, 2^63521161 is an apocalyptic number.

It is an amenable number.

63521161 is a deficient number, since it is larger than the sum of its proper divisors (9688439).

63521161 is a wasteful number, since it uses less digits than its factorization.

63521161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140.

The product of its digits is 1080, while the sum is 25.

The square root of 63521161 is about 7970.0163738853. The cubic root of 63521161 is about 398.9999204360. Note that the first 4 decimals are identical.

Adding to 63521161 its reverse (16112536), we get a palindrome (79633697).

The spelling of 63521161 in words is "sixty-three million, five hundred twenty-one thousand, one hundred sixty-one".