216602497 has 2 divisors, whose sum is σ = 216602498. Its totient is φ = 216602496.

The previous prime is 216602459. The next prime is 216602501. The reversal of 216602497 is 794206612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109914256 + 106688241 = 10484^2 + 10329^2 .

It is a cyclic number.

It is not a de Polignac number, because 216602497 - 2¹⁵ = 216569729 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216602447) 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, 108301248 + 108301249.

It is an arithmetic number, because the mean of its divisors is an integer number (108301249).

Almost surely, 2^216602497 is an apocalyptic number.

It is an amenable number.

216602497 is a deficient number, since it is larger than the sum of its proper divisors (1).

216602497 is an equidigital number, since it uses as much as digits as its factorization.

216602497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 216602497 is about 14717.4215472684. The cubic root of 216602497 is about 600.5573497011.

The spelling of 216602497 in words is "two hundred sixteen million, six hundred two thousand, four hundred ninety-seven".