218159804 has 6 divisors (see below), whose sum is σ = 381779664. Its totient is φ = 109079900.

The previous prime is 218159801. The next prime is 218159831. The reversal of 218159804 is 408951812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218159801) 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 as a sum of consecutive naturals, namely, 27269972 + ... + 27269979.

It is an arithmetic number, because the mean of its divisors is an integer number (63629944).

Almost surely, 2^218159804 is an apocalyptic number.

It is an amenable number.

218159804 is a deficient number, since it is larger than the sum of its proper divisors (163619860).

218159804 is a wasteful number, since it uses less digits than its factorization.

218159804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54539955 (or 54539953 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 218159804 is about 14770.2337151448. The cubic root of 218159804 is about 601.9931898436.

The spelling of 218159804 in words is "two hundred eighteen million, one hundred fifty-nine thousand, eight hundred four".