218555046 has 12 divisors (see below), whose sum is σ = 473535972. Its totient is φ = 72851676.

The previous prime is 218555033. The next prime is 218555047. The reversal of 218555046 is 640555812.

218555046 is a `hidden beast` number, since 21 + 85 + 550 + 4 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 218555046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218555047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6070956 + ... + 6070991.

It is an arithmetic number, because the mean of its divisors is an integer number (39461331).

Almost surely, 2^218555046 is an apocalyptic number.

218555046 is an abundant number, since it is smaller than the sum of its proper divisors (254980926).

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

218555046 is a wasteful number, since it uses less digits than its factorization.

218555046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12141955 (or 12141952 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 218555046 is about 14783.6073405648. The cubic root of 218555046 is about 602.3565159376.

The spelling of 218555046 in words is "two hundred eighteen million, five hundred fifty-five thousand, forty-six".