64522161 has 36 divisors (see below), whose sum is σ = 103325040. Its totient is φ = 38768400.

The previous prime is 64522141. The next prime is 64522181. The reversal of 64522161 is 16122546.

64522161 is a `hidden beast` number, since 645 + 2 + 2 + 16 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (64522141) and next prime (64522181).

It is not a de Polignac number, because 64522161 - 2¹⁹ = 63997873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64522111) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 194766 + ... + 195096.

It is an arithmetic number, because the mean of its divisors is an integer number (2870140).

Almost surely, 2^64522161 is an apocalyptic number.

It is an amenable number.

64522161 is a deficient number, since it is larger than the sum of its proper divisors (38802879).

64522161 is a wasteful number, since it uses less digits than its factorization.

64522161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538 (or 524 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 64522161 is about 8032.5687672126. The cubic root of 64522161 is about 401.0848902891.

It can be divided in two parts, 64 and 522161, that added together give a palindrome (522225).

The spelling of 64522161 in words is "sixty-four million, five hundred twenty-two thousand, one hundred sixty-one".