68222321 has 2 divisors, whose sum is σ = 68222322. Its totient is φ = 68222320.

The previous prime is 68222317. The next prime is 68222417. The reversal of 68222321 is 12322286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67831696 + 390625 = 8236^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 68222321 - 2² = 68222317 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68222221) by changing a digit.

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 as a sum of consecutive naturals, namely, 34111160 + 34111161.

It is an arithmetic number, because the mean of its divisors is an integer number (34111161).

Almost surely, 2^68222321 is an apocalyptic number.

It is an amenable number.

68222321 is a deficient number, since it is larger than the sum of its proper divisors (1).

68222321 is an equidigital number, since it uses as much as digits as its factorization.

68222321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 26.

The square root of 68222321 is about 8259.6804417604. The cubic root of 68222321 is about 408.6098486735.

The spelling of 68222321 in words is "sixty-eight million, two hundred twenty-two thousand, three hundred twenty-one".