68183221 has 2 divisors, whose sum is σ = 68183222. Its totient is φ = 68183220.

The previous prime is 68183197. The next prime is 68183231. The reversal of 68183221 is 12238186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55502500 + 12680721 = 7450^2 + 3561^2 .

It is a cyclic number.

It is not a de Polignac number, because 68183221 - 2¹¹ = 68181173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68183231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34091610 + 34091611.

It is an arithmetic number, because the mean of its divisors is an integer number (34091611).

Almost surely, 2^68183221 is an apocalyptic number.

It is an amenable number.

68183221 is a deficient number, since it is larger than the sum of its proper divisors (1).

68183221 is an equidigital number, since it uses as much as digits as its factorization.

68183221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 31.

The square root of 68183221 is about 8257.3131828701. The cubic root of 68183221 is about 408.5317720849.

The spelling of 68183221 in words is "sixty-eight million, one hundred eighty-three thousand, two hundred twenty-one".