218213082 has 32 divisors (see below), whose sum is σ = 487119360. Its totient is φ = 72407520.

The previous prime is 218213077. The next prime is 218213113. The reversal of 218213082 is 280312812.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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, 2982 + ... + 21102.

It is an arithmetic number, because the mean of its divisors is an integer number (15222480).

Almost surely, 2^218213082 is an apocalyptic number.

218213082 is an abundant number, since it is smaller than the sum of its proper divisors (268906278).

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

218213082 is a wasteful number, since it uses less digits than its factorization.

218213082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18355 (or 18349 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 218213082 is about 14772.0371648598. The cubic root of 218213082 is about 602.0421912056.

Adding to 218213082 its reverse (280312812), we get a palindrome (498525894).

The spelling of 218213082 in words is "two hundred eighteen million, two hundred thirteen thousand, eighty-two".