216049837 has 2 divisors, whose sum is σ = 216049838. Its totient is φ = 216049836.

The previous prime is 216049829. The next prime is 216049853. The reversal of 216049837 is 738940612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196812841 + 19236996 = 14029^2 + 4386^2 .

It is a cyclic number.

It is not a de Polignac number, because 216049837 - 2³ = 216049829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216049837.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216049037) 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, 108024918 + 108024919.

It is an arithmetic number, because the mean of its divisors is an integer number (108024919).

Almost surely, 2^216049837 is an apocalyptic number.

It is an amenable number.

216049837 is a deficient number, since it is larger than the sum of its proper divisors (1).

216049837 is an equidigital number, since it uses as much as digits as its factorization.

216049837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 216049837 is about 14698.6338480826. The cubic root of 216049837 is about 600.0461418218.

The spelling of 216049837 in words is "two hundred sixteen million, forty-nine thousand, eight hundred thirty-seven".