218223800 has 24 divisors (see below), whose sum is σ = 507370800. Its totient is φ = 87289440.

The previous prime is 218223739. The next prime is 218223809. The reversal of 218223800 is 8322812.

It is a self number, because there is not a number n which added to its sum of digits gives 218223800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218223809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 545360 + ... + 545759.

It is an arithmetic number, because the mean of its divisors is an integer number (21140450).

Almost surely, 2^218223800 is an apocalyptic number.

218223800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218223800 is an abundant number, since it is smaller than the sum of its proper divisors (289147000).

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

218223800 is a wasteful number, since it uses less digits than its factorization.

218223800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091135 (or 1091126 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 218223800 is about 14772.3999404294. The cubic root of 218223800 is about 602.0520479055.

The spelling of 218223800 in words is "two hundred eighteen million, two hundred twenty-three thousand, eight hundred".