216595013 has 2 divisors, whose sum is σ = 216595014. Its totient is φ = 216595012.

The previous prime is 216594919. The next prime is 216595021. The reversal of 216595013 is 310595612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215443684 + 1151329 = 14678^2 + 1073^2 .

It is a cyclic number.

It is not a de Polignac number, because 216595013 - 2⁸ = 216594757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216595033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108297506 + 108297507.

It is an arithmetic number, because the mean of its divisors is an integer number (108297507).

Almost surely, 2^216595013 is an apocalyptic number.

It is an amenable number.

216595013 is a deficient number, since it is larger than the sum of its proper divisors (1).

216595013 is an equidigital number, since it uses as much as digits as its factorization.

216595013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 216595013 is about 14717.1672885783. The cubic root of 216595013 is about 600.5504328480.

The spelling of 216595013 in words is "two hundred sixteen million, five hundred ninety-five thousand, thirteen".