218136013 has 2 divisors, whose sum is σ = 218136014. Its totient is φ = 218136012.

The previous prime is 218136007. The next prime is 218136019. The reversal of 218136013 is 310631812.

218136013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (218136007) and next prime (218136019).

It can be written as a sum of positive squares in only one way, i.e., 217208644 + 927369 = 14738^2 + 963^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218136013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218136019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109068006 + 109068007.

It is an arithmetic number, because the mean of its divisors is an integer number (109068007).

Almost surely, 2^218136013 is an apocalyptic number.

It is an amenable number.

218136013 is a deficient number, since it is larger than the sum of its proper divisors (1).

218136013 is an equidigital number, since it uses as much as digits as its factorization.

218136013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 218136013 is about 14769.4283233983. The cubic root of 218136013 is about 601.9713059763.

Adding to 218136013 its reverse (310631812), we get a palindrome (528767825).

The spelling of 218136013 in words is "two hundred eighteen million, one hundred thirty-six thousand, thirteen".