218304849 has 12 divisors (see below), whose sum is σ = 338595504. Its totient is φ = 124745544.

The previous prime is 218304841. The next prime is 218304881. The reversal of 218304849 is 948403812.

It is not a de Polignac number, because 218304849 - 2³ = 218304841 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (218304841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 742387 + ... + 742680.

It is an arithmetic number, because the mean of its divisors is an integer number (28216292).

Almost surely, 2^218304849 is an apocalyptic number.

It is an amenable number.

218304849 is a deficient number, since it is larger than the sum of its proper divisors (120290655).

218304849 is a wasteful number, since it uses less digits than its factorization.

218304849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485084 (or 1485077 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 218304849 is about 14775.1429434710. The cubic root of 218304849 is about 602.1265733494.

The spelling of 218304849 in words is "two hundred eighteen million, three hundred four thousand, eight hundred forty-nine".