512031217 has 2 divisors, whose sum is σ = 512031218. Its totient is φ = 512031216.

The previous prime is 512031193. The next prime is 512031239. The reversal of 512031217 is 712130215.

It is a happy number.

It is an a-pointer prime, because the next prime (512031239) can be obtained adding 512031217 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 492662416 + 19368801 = 22196^2 + 4401^2 .

It is a cyclic number.

It is not a de Polignac number, because 512031217 - 2¹¹ = 512029169 is a prime.

It is not a weakly prime, because it can be changed into another prime (512031257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256015608 + 256015609.

It is an arithmetic number, because the mean of its divisors is an integer number (256015609).

Almost surely, 2^512031217 is an apocalyptic number.

It is an amenable number.

512031217 is a deficient number, since it is larger than the sum of its proper divisors (1).

512031217 is an equidigital number, since it uses as much as digits as its factorization.

512031217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 512031217 is about 22628.1067922175. The cubic root of 512031217 is about 800.0162585237.

The spelling of 512031217 in words is "five hundred twelve million, thirty-one thousand, two hundred seventeen".