218473044 has 24 divisors (see below), whose sum is σ = 531935040. Its totient is φ = 69657984.

The previous prime is 218473043. The next prime is 218473081. The reversal of 218473044 is 440374812.

It is a junction number, because it is equal to n+sod(n) for n = 218472996 and 218473014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218473043) 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, 395509 + ... + 396060.

It is an arithmetic number, because the mean of its divisors is an integer number (22163960).

Almost surely, 2^218473044 is an apocalyptic number.

It is an amenable number.

218473044 is an abundant number, since it is smaller than the sum of its proper divisors (313461996).

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

218473044 is a wasteful number, since it uses less digits than its factorization.

218473044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791599 (or 791597 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 218473044 is about 14780.8336706696. The cubic root of 218473044 is about 602.2811716573.

The spelling of 218473044 in words is "two hundred eighteen million, four hundred seventy-three thousand, forty-four".