213630212617 has 2 divisors, whose sum is σ = 213630212618. Its totient is φ = 213630212616.

The previous prime is 213630212603. The next prime is 213630212659. The reversal of 213630212617 is 716212036312.

213630212617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152514461961 + 61115750656 = 390531^2 + 247216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213630212617 is a prime.

It is not a weakly prime, because it can be changed into another prime (213630212687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106815106308 + 106815106309.

It is an arithmetic number, because the mean of its divisors is an integer number (106815106309).

Almost surely, 2^213630212617 is an apocalyptic number.

It is an amenable number.

213630212617 is a deficient number, since it is larger than the sum of its proper divisors (1).

213630212617 is an equidigital number, since it uses as much as digits as its factorization.

213630212617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

Adding to 213630212617 its reverse (716212036312), we get a palindrome (929842248929).

The spelling of 213630212617 in words is "two hundred thirteen billion, six hundred thirty million, two hundred twelve thousand, six hundred seventeen".