173042213 has 2 divisors, whose sum is σ = 173042214. Its totient is φ = 173042212.

The previous prime is 173042171. The next prime is 173042251. The reversal of 173042213 is 312240371.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173001409 + 40804 = 13153^2 + 202^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-173042213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173042273) 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, 86521106 + 86521107.

It is an arithmetic number, because the mean of its divisors is an integer number (86521107).

Almost surely, 2^173042213 is an apocalyptic number.

It is an amenable number.

173042213 is a deficient number, since it is larger than the sum of its proper divisors (1).

173042213 is an equidigital number, since it uses as much as digits as its factorization.

173042213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 173042213 is about 13154.5510375687. The cubic root of 173042213 is about 557.2507823201.

Adding to 173042213 its reverse (312240371), we get a palindrome (485282584).

The spelling of 173042213 in words is "one hundred seventy-three million, forty-two thousand, two hundred thirteen".