512343217 has 2 divisors, whose sum is σ = 512343218. Its totient is φ = 512343216.

The previous prime is 512343187. The next prime is 512343241. The reversal of 512343217 is 712343215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504271936 + 8071281 = 22456^2 + 2841^2 .

It is a cyclic number.

It is not a de Polignac number, because 512343217 - 2¹⁹ = 511818929 is a prime.

It is not a weakly prime, because it can be changed into another prime (512343277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256171608 + 256171609.

It is an arithmetic number, because the mean of its divisors is an integer number (256171609).

Almost surely, 2^512343217 is an apocalyptic number.

It is an amenable number.

512343217 is a deficient number, since it is larger than the sum of its proper divisors (1).

512343217 is an equidigital number, since it uses as much as digits as its factorization.

512343217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 28.

The square root of 512343217 is about 22634.9998232825. Note that the first 3 decimals coincide. The cubic root of 512343217 is about 800.1787189256.

The spelling of 512343217 in words is "five hundred twelve million, three hundred forty-three thousand, two hundred seventeen".