218388234297 has 16 divisors (see below), whose sum is σ = 292125556800. Its totient is φ = 145121840832.

The previous prime is 218388234221. The next prime is 218388234299. The reversal of 218388234297 is 792432883812.

It is not a de Polignac number, because 218388234297 - 2⁸ = 218388234041 is a prime.

It is a super-2 number, since 2×218388234297² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (218388234299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2933578 + ... + 3007100.

It is an arithmetic number, because the mean of its divisors is an integer number (18257847300).

Almost surely, 2^218388234297 is an apocalyptic number.

It is an amenable number.

218388234297 is a deficient number, since it is larger than the sum of its proper divisors (73737322503).

218388234297 is a wasteful number, since it uses less digits than its factorization.

218388234297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76712.

The product of its digits is 9289728, while the sum is 57.

The spelling of 218388234297 in words is "two hundred eighteen billion, three hundred eighty-eight million, two hundred thirty-four thousand, two hundred ninety-seven".