67221229 has 2 divisors, whose sum is σ = 67221230. Its totient is φ = 67221228.

The previous prime is 67221211. The next prime is 67221241. The reversal of 67221229 is 92212276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66015625 + 1205604 = 8125^2 + 1098^2 .

It is a cyclic number.

It is not a de Polignac number, because 67221229 - 2⁵ = 67221197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67221229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67221629) 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, 33610614 + 33610615.

It is an arithmetic number, because the mean of its divisors is an integer number (33610615).

Almost surely, 2^67221229 is an apocalyptic number.

It is an amenable number.

67221229 is a deficient number, since it is larger than the sum of its proper divisors (1).

67221229 is an equidigital number, since it uses as much as digits as its factorization.

67221229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 31.

The square root of 67221229 is about 8198.8553469372. The cubic root of 67221229 is about 406.6013498818.

The spelling of 67221229 in words is "sixty-seven million, two hundred twenty-one thousand, two hundred twenty-nine".