64217144 has 16 divisors (see below), whose sum is σ = 120513120. Its totient is φ = 32080320.

The previous prime is 64217141. The next prime is 64217159. The reversal of 64217144 is 44171246.

It is a happy number.

64217144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64217141) 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 3 ways as a sum of consecutive naturals, for example, 8564 + ... + 14204.

It is an arithmetic number, because the mean of its divisors is an integer number (7532070).

Almost surely, 2^64217144 is an apocalyptic number.

It is an amenable number.

64217144 is a deficient number, since it is larger than the sum of its proper divisors (56295976).

64217144 is a wasteful number, since it uses less digits than its factorization.

64217144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7070 (or 7066 counting only the distinct ones).

The product of its digits is 5376, while the sum is 29.

The square root of 64217144 is about 8013.5600078866. The cubic root of 64217144 is about 400.4518726688.

The spelling of 64217144 in words is "sixty-four million, two hundred seventeen thousand, one hundred forty-four".