68512212 has 18 divisors (see below), whose sum is σ = 173183738. Its totient is φ = 22837392.

The previous prime is 68512187. The next prime is 68512243. The reversal of 68512212 is 21221586.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 51322896 + 17189316 = 7164^2 + 4146^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 951523 + ... + 951594.

Almost surely, 2^68512212 is an apocalyptic number.

It is an amenable number.

68512212 is an abundant number, since it is smaller than the sum of its proper divisors (104671526).

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

68512212 is a wasteful number, since it uses less digits than its factorization.

68512212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1903127 (or 1903122 counting only the distinct ones).

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

The square root of 68512212 is about 8277.2103996455. The cubic root of 68512212 is about 409.1877872649.

Adding to 68512212 its reverse (21221586), we get a palindrome (89733798).

The spelling of 68512212 in words is "sixty-eight million, five hundred twelve thousand, two hundred twelve".