68522213 has 2 divisors, whose sum is σ = 68522214. Its totient is φ = 68522212.

The previous prime is 68522197. The next prime is 68522219. The reversal of 68522213 is 31222586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65642404 + 2879809 = 8102^2 + 1697^2 .

It is a cyclic number.

It is not a de Polignac number, because 68522213 - 2⁴ = 68522197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68522219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34261106 + 34261107.

It is an arithmetic number, because the mean of its divisors is an integer number (34261107).

Almost surely, 2^68522213 is an apocalyptic number.

It is an amenable number.

68522213 is a deficient number, since it is larger than the sum of its proper divisors (1).

68522213 is an equidigital number, since it uses as much as digits as its factorization.

68522213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 29.

The square root of 68522213 is about 8277.8145062571. The cubic root of 68522213 is about 409.2076965523.

Adding to 68522213 its reverse (31222586), we get a palindrome (99744799).

The spelling of 68522213 in words is "sixty-eight million, five hundred twenty-two thousand, two hundred thirteen".