65215212 has 24 divisors (see below), whose sum is σ = 158785536. Its totient is φ = 20793168.

The previous prime is 65215193. The next prime is 65215217. The reversal of 65215212 is 21251256.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (65215217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117868 + ... + 118419.

It is an arithmetic number, because the mean of its divisors is an integer number (6616064).

Almost surely, 2^65215212 is an apocalyptic number.

It is an amenable number.

65215212 is an abundant number, since it is smaller than the sum of its proper divisors (93570324).

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

65215212 is a wasteful number, since it uses less digits than its factorization.

65215212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236317 (or 236315 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 65215212 is about 8075.5936004730. The cubic root of 65215212 is about 402.5158349286.

Adding to 65215212 its reverse (21251256), we get a palindrome (86466468).

The spelling of 65215212 in words is "sixty-five million, two hundred fifteen thousand, two hundred twelve".