218381468 has 6 divisors (see below), whose sum is σ = 382167576. Its totient is φ = 109190732.

The previous prime is 218381467. The next prime is 218381483. The reversal of 218381468 is 864183812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218381461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27297680 + ... + 27297687.

It is an arithmetic number, because the mean of its divisors is an integer number (63694596).

Almost surely, 2^218381468 is an apocalyptic number.

It is an amenable number.

218381468 is a deficient number, since it is larger than the sum of its proper divisors (163786108).

218381468 is a wasteful number, since it uses less digits than its factorization.

218381468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54595371 (or 54595369 counting only the distinct ones).

The product of its digits is 73728, while the sum is 41.

The square root of 218381468 is about 14777.7355504827. The cubic root of 218381468 is about 602.1970084007.

The spelling of 218381468 in words is "two hundred eighteen million, three hundred eighty-one thousand, four hundred sixty-eight".