512808217 has 2 divisors, whose sum is σ = 512808218. Its totient is φ = 512808216.

The previous prime is 512808187. The next prime is 512808227. The reversal of 512808217 is 712808215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 463583961 + 49224256 = 21531^2 + 7016^2 .

It is a cyclic number.

It is not a de Polignac number, because 512808217 - 2²⁷ = 378590489 is a prime.

It is not a weakly prime, because it can be changed into another prime (512808227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256404108 + 256404109.

It is an arithmetic number, because the mean of its divisors is an integer number (256404109).

Almost surely, 2^512808217 is an apocalyptic number.

It is an amenable number.

512808217 is a deficient number, since it is larger than the sum of its proper divisors (1).

512808217 is an equidigital number, since it uses as much as digits as its factorization.

512808217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 512808217 is about 22645.2691968985. The cubic root of 512808217 is about 800.4207250534.

The spelling of 512808217 in words is "five hundred twelve million, eight hundred eight thousand, two hundred seventeen".