218621068 has 12 divisors (see below), whose sum is σ = 402723160. Its totient is φ = 103557312.

The previous prime is 218621047. The next prime is 218621077. The reversal of 218621068 is 860126812.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1438221 + ... + 1438372.

Almost surely, 2^218621068 is an apocalyptic number.

It is an amenable number.

218621068 is a deficient number, since it is larger than the sum of its proper divisors (184102092).

218621068 is a wasteful number, since it uses less digits than its factorization.

218621068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2876616 (or 2876614 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 218621068 is about 14785.8401181671. The cubic root of 218621068 is about 602.4171639357.

The spelling of 218621068 in words is "two hundred eighteen million, six hundred twenty-one thousand, sixty-eight".