218220982 has 8 divisors (see below), whose sum is σ = 374093136. Its totient is φ = 93523272.

The previous prime is 218220971. The next prime is 218221007. The reversal of 218220982 is 289022812.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 7793593 + ... + 7793620.

It is an arithmetic number, because the mean of its divisors is an integer number (46761642).

Almost surely, 2^218220982 is an apocalyptic number.

218220982 is a deficient number, since it is larger than the sum of its proper divisors (155872154).

218220982 is a wasteful number, since it uses less digits than its factorization.

218220982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15587222.

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

The square root of 218220982 is about 14772.3045595466. The cubic root of 218220982 is about 602.0494563917.

The spelling of 218220982 in words is "two hundred eighteen million, two hundred twenty thousand, nine hundred eighty-two".