68516212 has 12 divisors (see below), whose sum is σ = 124038180. Its totient is φ = 33076736.

The previous prime is 68516209. The next prime is 68516221. The reversal of 68516212 is 21261586.

It can be written as a sum of positive squares in 2 ways, for example, as 22221796 + 46294416 = 4714^2 + 6804^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 295213 + ... + 295444.

It is an arithmetic number, because the mean of its divisors is an integer number (10336515).

Almost surely, 2^68516212 is an apocalyptic number.

It is an amenable number.

68516212 is a deficient number, since it is larger than the sum of its proper divisors (55521968).

68516212 is a wasteful number, since it uses less digits than its factorization.

68516212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590690 (or 590688 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 68516212 is about 8277.4520234188. The cubic root of 68516212 is about 409.1957504160.

Adding to 68516212 its reverse (21261586), we get a palindrome (89777798).

The spelling of 68516212 in words is "sixty-eight million, five hundred sixteen thousand, two hundred twelve".