218882421522 has 18 divisors (see below), whose sum is σ = 474249547317. Its totient is φ = 72960145536.

The previous prime is 218882421521. The next prime is 218882421577. The reversal of 218882421522 is 225124288812.

218882421522 is a `hidden beast` number, since 2 + 1 + 8 + 8 + 82 + 42 + 1 + 522 = 666.

218882421522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 118658891961 + 100223529561 = 344469^2 + 316581^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=330819.

It is not an unprimeable number, because it can be changed into a prime (218882421521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1929778 + ... + 2040050.

Almost surely, 2^218882421522 is an apocalyptic number.

218882421522 is an abundant number, since it is smaller than the sum of its proper divisors (255367125795).

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

218882421522 is an frugal number, since it uses more digits than its factorization.

218882421522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220554 (or 110278 counting only the distinct ones).

The product of its digits is 327680, while the sum is 45.

The spelling of 218882421522 in words is "two hundred eighteen billion, eight hundred eighty-two million, four hundred twenty-one thousand, five hundred twenty-two".