218238511113 has 32 divisors (see below), whose sum is σ = 388951961600. Its totient is φ = 118144154448.

The previous prime is 218238511093. The next prime is 218238511133. The reversal of 218238511113 is 311115832812.

218238511113 is a `hidden beast` number, since 2 + 1 + 8 + 23 + 8 + 511 + 113 = 666.

It is an interprime number because it is at equal distance from previous prime (218238511093) and next prime (218238511133).

It is not a de Polignac number, because 218238511113 - 2¹² = 218238507017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218238511133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30383281 + ... + 30390462.

It is an arithmetic number, because the mean of its divisors is an integer number (12154748800).

Almost surely, 2^218238511113 is an apocalyptic number.

It is an amenable number.

218238511113 is a deficient number, since it is larger than the sum of its proper divisors (170713450487).

218238511113 is a wasteful number, since it uses less digits than its factorization.

218238511113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60773778 (or 60773772 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The spelling of 218238511113 in words is "two hundred eighteen billion, two hundred thirty-eight million, five hundred eleven thousand, one hundred thirteen".