218941472 has 12 divisors (see below), whose sum is σ = 431041086. Its totient is φ = 109470720.

The previous prime is 218941421. The next prime is 218941483. The reversal of 218941472 is 274149812.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 179452816 + 39488656 = 13396^2 + 6284^2 .

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3420929 + ... + 3420992.

Almost surely, 2^218941472 is an apocalyptic number.

It is an amenable number.

218941472 is a deficient number, since it is larger than the sum of its proper divisors (212099614).

218941472 is an equidigital number, since it uses as much as digits as its factorization.

218941472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6841931 (or 6841923 counting only the distinct ones).

The product of its digits is 32256, while the sum is 38.

The square root of 218941472 is about 14796.6709769461. The cubic root of 218941472 is about 602.7113146846.

The spelling of 218941472 in words is "two hundred eighteen million, nine hundred forty-one thousand, four hundred seventy-two".