166281229 has 2 divisors, whose sum is σ = 166281230. Its totient is φ = 166281228.

The previous prime is 166281211. The next prime is 166281239. The reversal of 166281229 is 922182661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102313225 + 63968004 = 10115^2 + 7998^2 .

It is a cyclic number.

It is not a de Polignac number, because 166281229 - 2⁵ = 166281197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166281209) 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, 83140614 + 83140615.

It is an arithmetic number, because the mean of its divisors is an integer number (83140615).

Almost surely, 2^166281229 is an apocalyptic number.

It is an amenable number.

166281229 is a deficient number, since it is larger than the sum of its proper divisors (1).

166281229 is an equidigital number, since it uses as much as digits as its factorization.

166281229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The square root of 166281229 is about 12895.0079100402. The cubic root of 166281229 is about 549.8966516558.

The spelling of 166281229 in words is "one hundred sixty-six million, two hundred eighty-one thousand, two hundred twenty-nine".