218624113 has 2 divisors, whose sum is σ = 218624114. Its totient is φ = 218624112.

The previous prime is 218624111. The next prime is 218624117. The reversal of 218624113 is 311426812.

218624113 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., 205721649 + 12902464 = 14343^2 + 3592^2 .

It is a cyclic number.

It is not a de Polignac number, because 218624113 - 2¹ = 218624111 is a prime.

Together with 218624111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (218624111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109312056 + 109312057.

It is an arithmetic number, because the mean of its divisors is an integer number (109312057).

Almost surely, 2^218624113 is an apocalyptic number.

It is an amenable number.

218624113 is a deficient number, since it is larger than the sum of its proper divisors (1).

218624113 is an equidigital number, since it uses as much as digits as its factorization.

218624113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 28.

The square root of 218624113 is about 14785.9430879467. The cubic root of 218624113 is about 602.4199607869.

The spelling of 218624113 in words is "two hundred eighteen million, six hundred twenty-four thousand, one hundred thirteen".