218214224 has 20 divisors (see below), whose sum is σ = 425326944. Its totient is φ = 108452448.

The previous prime is 218214181. The next prime is 218214233. The reversal of 218214224 is 422412812.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 218214193 and 218214202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38162 + ... + 43505.

Almost surely, 2^218214224 is an apocalyptic number.

It is an amenable number.

218214224 is a deficient number, since it is larger than the sum of its proper divisors (207112720).

218214224 is a wasteful number, since it uses less digits than its factorization.

218214224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81842 (or 81836 counting only the distinct ones).

The product of its digits is 2048, while the sum is 26.

The square root of 218214224 is about 14772.0758189227. The cubic root of 218214224 is about 602.0432414497.

The spelling of 218214224 in words is "two hundred eighteen million, two hundred fourteen thousand, two hundred twenty-four".