218213996 has 48 divisors (see below), whose sum is σ = 512736000. Its totient is φ = 78477120.

The previous prime is 218213987. The next prime is 218213999. The reversal of 218213996 is 699312812.

It is not an unprimeable number, because it can be changed into a prime (218213999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23246 + ... + 31253.

It is an arithmetic number, because the mean of its divisors is an integer number (10682000).

Almost surely, 2^218213996 is an apocalyptic number.

218213996 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

218213996 is an abundant number, since it is smaller than the sum of its proper divisors (294522004).

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

218213996 is a wasteful number, since it uses less digits than its factorization.

218213996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54534 (or 54532 counting only the distinct ones).

The product of its digits is 46656, while the sum is 41.

The square root of 218213996 is about 14772.0681016573. The cubic root of 218213996 is about 602.0430317690.

The spelling of 218213996 in words is "two hundred eighteen million, two hundred thirteen thousand, nine hundred ninety-six".