508315217 has 2 divisors, whose sum is σ = 508315218. Its totient is φ = 508315216.

The previous prime is 508315207. The next prime is 508315243. The reversal of 508315217 is 712513805.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 482417296 + 25897921 = 21964^2 + 5089^2 .

It is a cyclic number.

It is not a de Polignac number, because 508315217 - 2¹² = 508311121 is a prime.

It is not a weakly prime, because it can be changed into another prime (508315207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254157608 + 254157609.

It is an arithmetic number, because the mean of its divisors is an integer number (254157609).

Almost surely, 2^508315217 is an apocalyptic number.

It is an amenable number.

508315217 is a deficient number, since it is larger than the sum of its proper divisors (1).

508315217 is an equidigital number, since it uses as much as digits as its factorization.

508315217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 508315217 is about 22545.8470011663. The cubic root of 508315217 is about 798.0762197326.

The spelling of 508315217 in words is "five hundred eight million, three hundred fifteen thousand, two hundred seventeen".