218223124 has 12 divisors (see below), whose sum is σ = 436446304. Its totient is φ = 93524184.

The previous prime is 218223107. The next prime is 218223127. The reversal of 218223124 is 421322812.

218223124 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218223127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3896814 + ... + 3896869.

Almost surely, 2^218223124 is an apocalyptic number.

It is an amenable number.

218223124 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218223124 is a wasteful number, since it uses less digits than its factorization.

218223124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7793694 (or 7793692 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 218223124 is about 14772.3770599047. The cubic root of 218223124 is about 602.0514262385.

Adding to 218223124 its reverse (421322812), we get a palindrome (639545936).

The spelling of 218223124 in words is "two hundred eighteen million, two hundred twenty-three thousand, one hundred twenty-four".