218343452 has 12 divisors (see below), whose sum is σ = 386705256. Its totient is φ = 107856240.

The previous prime is 218343449. The next prime is 218343457. The reversal of 218343452 is 254343812.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218343457) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 328499 + ... + 329162.

It is an arithmetic number, because the mean of its divisors is an integer number (32225438).

Almost surely, 2^218343452 is an apocalyptic number.

It is an amenable number.

218343452 is a deficient number, since it is larger than the sum of its proper divisors (168361804).

218343452 is a wasteful number, since it uses less digits than its factorization.

218343452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657748 (or 657746 counting only the distinct ones).

The product of its digits is 23040, while the sum is 32.

The square root of 218343452 is about 14776.4492351850. The cubic root of 218343452 is about 602.1620627461.

The spelling of 218343452 in words is "two hundred eighteen million, three hundred forty-three thousand, four hundred fifty-two".