168211229 has 2 divisors, whose sum is σ = 168211230. Its totient is φ = 168211228.

The previous prime is 168211181. The next prime is 168211249. The reversal of 168211229 is 922112861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110040100 + 58171129 = 10490^2 + 7627^2 .

It is a cyclic number.

It is not a de Polignac number, because 168211229 - 2²⁴ = 151434013 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 168211195 and 168211204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168211249) 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, 84105614 + 84105615.

It is an arithmetic number, because the mean of its divisors is an integer number (84105615).

Almost surely, 2^168211229 is an apocalyptic number.

It is an amenable number.

168211229 is a deficient number, since it is larger than the sum of its proper divisors (1).

168211229 is an equidigital number, since it uses as much as digits as its factorization.

168211229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 32.

The square root of 168211229 is about 12969.6271727448. The cubic root of 168211229 is about 552.0159942943.

The spelling of 168211229 in words is "one hundred sixty-eight million, two hundred eleven thousand, two hundred twenty-nine".