218939422 has 16 divisors (see below), whose sum is σ = 365081472. Its totient is φ = 97788960.

The previous prime is 218939419. The next prime is 218939459. The reversal of 218939422 is 224939812.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135013 + ... + 136624.

It is an arithmetic number, because the mean of its divisors is an integer number (22817592).

Almost surely, 2^218939422 is an apocalyptic number.

218939422 is a deficient number, since it is larger than the sum of its proper divisors (146142050).

218939422 is a wasteful number, since it uses less digits than its factorization.

218939422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271683.

The product of its digits is 62208, while the sum is 40.

The square root of 218939422 is about 14796.6017044455. The cubic root of 218939422 is about 602.7094335699.

The spelling of 218939422 in words is "two hundred eighteen million, nine hundred thirty-nine thousand, four hundred twenty-two".