213168317 has 2 divisors, whose sum is σ = 213168318. Its totient is φ = 213168316.

The previous prime is 213168313. The next prime is 213168323. The reversal of 213168317 is 713861312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108597241 + 104571076 = 10421^2 + 10226^2 .

It is a cyclic number.

It is not a de Polignac number, because 213168317 - 2² = 213168313 is a prime.

It is a super-2 number, since 2×213168317² = 90881462745224978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213168311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106584158 + 106584159.

It is an arithmetic number, because the mean of its divisors is an integer number (106584159).

Almost surely, 2^213168317 is an apocalyptic number.

It is an amenable number.

213168317 is a deficient number, since it is larger than the sum of its proper divisors (1).

213168317 is an equidigital number, since it uses as much as digits as its factorization.

213168317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 32.

The square root of 213168317 is about 14600.2848259888. The cubic root of 213168317 is about 597.3665295964.

The spelling of 213168317 in words is "two hundred thirteen million, one hundred sixty-eight thousand, three hundred seventeen".