218228321958 has 16 divisors (see below), whose sum is σ = 436466578800. Its totient is φ = 72741118176.

The previous prime is 218228321957. The next prime is 218228322049. The reversal of 218228321958 is 859123822812.

It is a self number, because there is not a number n which added to its sum of digits gives 218228321958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218228321957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111385 + ... + 669972.

It is an arithmetic number, because the mean of its divisors is an integer number (27279161175).

Almost surely, 2^218228321958 is an apocalyptic number.

218228321958 is an abundant number, since it is smaller than the sum of its proper divisors (218238256842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218228321958 is a wasteful number, since it uses less digits than its factorization.

218228321958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827911.

The product of its digits is 1105920, while the sum is 51.

The spelling of 218228321958 in words is "two hundred eighteen billion, two hundred twenty-eight million, three hundred twenty-one thousand, nine hundred fifty-eight".