218219998 has 16 divisors (see below), whose sum is σ = 343195776. Its totient is φ = 103866840.

The previous prime is 218219971. The next prime is 218220001. The reversal of 218219998 is 899912812.

218219998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1536 + ... + 20947.

It is an arithmetic number, because the mean of its divisors is an integer number (21449736).

Almost surely, 2^218219998 is an apocalyptic number.

218219998 is a deficient number, since it is larger than the sum of its proper divisors (124975778).

218219998 is a wasteful number, since it uses less digits than its factorization.

218219998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22719.

The product of its digits is 186624, while the sum is 49.

The square root of 218219998 is about 14772.2712539406. The cubic root of 218219998 is about 602.0485514717.

The spelling of 218219998 in words is "two hundred eighteen million, two hundred nineteen thousand, nine hundred ninety-eight".