216502774307 has 2 divisors, whose sum is σ = 216502774308. Its totient is φ = 216502774306.

The previous prime is 216502774261. The next prime is 216502774333. The reversal of 216502774307 is 703477205612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216502774307 - 2¹⁰ = 216502773283 is a prime.

It is not a weakly prime, because it can be changed into another prime (216502774337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108251387153 + 108251387154.

It is an arithmetic number, because the mean of its divisors is an integer number (108251387154).

Almost surely, 2^216502774307 is an apocalyptic number.

216502774307 is a deficient number, since it is larger than the sum of its proper divisors (1).

216502774307 is an equidigital number, since it uses as much as digits as its factorization.

216502774307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 493920, while the sum is 44.

Adding to 216502774307 its reverse (703477205612), we get a palindrome (919979979919).

The spelling of 216502774307 in words is "two hundred sixteen billion, five hundred two million, seven hundred seventy-four thousand, three hundred seven".