218248656 has 40 divisors (see below), whose sum is σ = 588325440. Its totient is φ = 69586176.

The previous prime is 218248651. The next prime is 218248663. The reversal of 218248656 is 656842812.

218248656 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218248651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97741 + ... + 99948.

It is an arithmetic number, because the mean of its divisors is an integer number (14708136).

Almost surely, 2^218248656 is an apocalyptic number.

It is an amenable number.

218248656 is an abundant number, since it is smaller than the sum of its proper divisors (370076784).

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

218248656 is a wasteful number, since it uses less digits than its factorization.

218248656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197723 (or 197717 counting only the distinct ones).

The product of its digits is 184320, while the sum is 42.

The square root of 218248656 is about 14773.2412151159. The cubic root of 218248656 is about 602.0749052314.

The spelling of 218248656 in words is "two hundred eighteen million, two hundred forty-eight thousand, six hundred fifty-six".