65216212 has 6 divisors (see below), whose sum is σ = 114128378. Its totient is φ = 32608104.

The previous prime is 65216209. The next prime is 65216297. The reversal of 65216212 is 21261256.

It can be written as a sum of positive squares in only one way, i.e., 64224196 + 992016 = 8014^2 + 996^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8152023 + ... + 8152030.

Almost surely, 2^65216212 is an apocalyptic number.

It is an amenable number.

65216212 is a deficient number, since it is larger than the sum of its proper divisors (48912166).

65216212 is a wasteful number, since it uses less digits than its factorization.

65216212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16304057 (or 16304055 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 65216212 is about 8075.6555151888. The cubic root of 65216212 is about 402.5178922900.

Adding to 65216212 its reverse (21261256), we get a palindrome (86477468).

The spelling of 65216212 in words is "sixty-five million, two hundred sixteen thousand, two hundred twelve".