65631212 has 6 divisors (see below), whose sum is σ = 114854628. Its totient is φ = 32815604.

The previous prime is 65631211. The next prime is 65631217. The reversal of 65631212 is 21213656.

It is not an unprimeable number, because it can be changed into a prime (65631211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8203898 + ... + 8203905.

It is an arithmetic number, because the mean of its divisors is an integer number (19142438).

Almost surely, 2^65631212 is an apocalyptic number.

It is an amenable number.

65631212 is a deficient number, since it is larger than the sum of its proper divisors (49223416).

65631212 is a wasteful number, since it uses less digits than its factorization.

65631212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16407807 (or 16407805 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 65631212 is about 8101.3092769009. The cubic root of 65631212 is about 403.3698882395.

Adding to 65631212 its reverse (21213656), we get a palindrome (86844868).

The spelling of 65631212 in words is "sixty-five million, six hundred thirty-one thousand, two hundred twelve".