68821216 has 12 divisors (see below), whose sum is σ = 135491832. Its totient is φ = 34410592.

The previous prime is 68821187. The next prime is 68821241. The reversal of 68821216 is 61212886.

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, 1075300 + ... + 1075363.

It is an arithmetic number, because the mean of its divisors is an integer number (11290986).

Almost surely, 2^68821216 is an apocalyptic number.

It is an amenable number.

68821216 is a deficient number, since it is larger than the sum of its proper divisors (66670616).

68821216 is a wasteful number, since it uses less digits than its factorization.

68821216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150673 (or 2150665 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 68821216 is about 8295.8553507158. The cubic root of 68821216 is about 409.8020380833.

It can be divided in two parts, 688 and 21216, that added together give a square (21904 = 148²).

The spelling of 68821216 in words is "sixty-eight million, eight hundred twenty-one thousand, two hundred sixteen".