218052818 has 4 divisors (see below), whose sum is σ = 327079230. Its totient is φ = 109026408.

The previous prime is 218052781. The next prime is 218052847. The reversal of 218052818 is 818250812.

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

It can be written as a sum of positive squares in only one way, i.e., 208022929 + 10029889 = 14423^2 + 3167^2 .

It is a super-2 number, since 2×218052818² = 95094062875482248, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54513203 + ... + 54513206.

Almost surely, 2^218052818 is an apocalyptic number.

218052818 is a deficient number, since it is larger than the sum of its proper divisors (109026412).

218052818 is a wasteful number, since it uses less digits than its factorization.

218052818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109026411.

The product of its (nonzero) digits is 10240, while the sum is 35.

The square root of 218052818 is about 14766.6115950817. The cubic root of 218052818 is about 601.8947675355.

The spelling of 218052818 in words is "two hundred eighteen million, fifty-two thousand, eight hundred eighteen".