68321215 has 16 divisors (see below), whose sum is σ = 87456672. Its totient is φ = 51057664.

The previous prime is 68321213. The next prime is 68321251. The reversal of 68321215 is 51212386.

It is not a de Polignac number, because 68321215 - 2¹ = 68321213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68321213) 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 in 15 ways as a sum of consecutive naturals, for example, 8712 + ... + 14578.

It is an arithmetic number, because the mean of its divisors is an integer number (5466042).

Almost surely, 2^68321215 is an apocalyptic number.

68321215 is a deficient number, since it is larger than the sum of its proper divisors (19135457).

68321215 is a wasteful number, since it uses less digits than its factorization.

68321215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6026.

The product of its digits is 2880, while the sum is 28.

The square root of 68321215 is about 8265.6648250458. The cubic root of 68321215 is about 408.8071914788.

The spelling of 68321215 in words is "sixty-eight million, three hundred twenty-one thousand, two hundred fifteen".