65218212 has 36 divisors (see below), whose sum is σ = 166407696. Its totient is φ = 21534960.

The previous prime is 65218193. The next prime is 65218253. The reversal of 65218212 is 21281256.

It is a happy number.

65218212 is a `hidden beast` number, since 652 + 1 + 8 + 2 + 1 + 2 = 666.

65218212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 4614 + ... + 12317.

It is an arithmetic number, because the mean of its divisors is an integer number (4622436).

Almost surely, 2^65218212 is an apocalyptic number.

It is an amenable number.

65218212 is an abundant number, since it is smaller than the sum of its proper divisors (101189484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65218212 is a wasteful number, since it uses less digits than its factorization.

65218212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17048 (or 17043 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 65218212 is about 8075.7793431965. The cubic root of 65218212 is about 402.5220069497.

Adding to 65218212 its reverse (21281256), we get a palindrome (86499468).

The spelling of 65218212 in words is "sixty-five million, two hundred eighteen thousand, two hundred twelve".