218522912687113 has 2 divisors, whose sum is σ = 218522912687114. Its totient is φ = 218522912687112.

The previous prime is 218522912687089. The next prime is 218522912687159. The reversal of 218522912687113 is 311786219225812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213401055712009 + 5121856975104 = 14608253^2 + 2263152^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218522912687113 is a prime.

It is a super-2 number, since 2×218522912687113² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (218522912685113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109261456343556 + 109261456343557.

It is an arithmetic number, because the mean of its divisors is an integer number (109261456343557).

Almost surely, 2^{218522912687113} is an apocalyptic number.

It is an amenable number.

218522912687113 is a deficient number, since it is larger than the sum of its proper divisors (1).

218522912687113 is an equidigital number, since it uses as much as digits as its factorization.

218522912687113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5806080, while the sum is 58.

The spelling of 218522912687113 in words is "two hundred eighteen trillion, five hundred twenty-two billion, nine hundred twelve million, six hundred eighty-seven thousand, one hundred thirteen".