218102998 has 4 divisors (see below), whose sum is σ = 327154500. Its totient is φ = 109051498.

The previous prime is 218102993. The next prime is 218103019. The reversal of 218102998 is 899201812.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 218102998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218102993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54525748 + ... + 54525751.

It is an arithmetic number, because the mean of its divisors is an integer number (81788625).

Almost surely, 2^218102998 is an apocalyptic number.

218102998 is a deficient number, since it is larger than the sum of its proper divisors (109051502).

218102998 is a wasteful number, since it uses less digits than its factorization.

218102998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109051501.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 218102998 is about 14768.3106007424. The cubic root of 218102998 is about 601.9409348863.

The spelling of 218102998 in words is "two hundred eighteen million, one hundred two thousand, nine hundred ninety-eight".