512173213 has 2 divisors, whose sum is σ = 512173214. Its totient is φ = 512173212.

The previous prime is 512173133. The next prime is 512173217. The reversal of 512173213 is 312371215.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 453604804 + 58568409 = 21298^2 + 7653^2 .

It is a cyclic number.

It is not a de Polignac number, because 512173213 - 2⁹ = 512172701 is a prime.

It is a super-2 number, since 2×512173213² = 524642800229486738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (512173217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256086606 + 256086607.

It is an arithmetic number, because the mean of its divisors is an integer number (256086607).

Almost surely, 2^512173213 is an apocalyptic number.

It is an amenable number.

512173213 is a deficient number, since it is larger than the sum of its proper divisors (1).

512173213 is an equidigital number, since it uses as much as digits as its factorization.

512173213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 25.

The square root of 512173213 is about 22631.2441770222. The cubic root of 512173213 is about 800.0902049326.

The spelling of 512173213 in words is "five hundred twelve million, one hundred seventy-three thousand, two hundred thirteen".