218528332 has 12 divisors (see below), whose sum is σ = 417190536. Its totient is φ = 99331040.

The previous prime is 218528281. The next prime is 218528341. The reversal of 218528332 is 233825812.

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 3 ways as a sum of consecutive naturals, for example, 2483233 + ... + 2483320.

It is an arithmetic number, because the mean of its divisors is an integer number (34765878).

Almost surely, 2^218528332 is an apocalyptic number.

218528332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

218528332 is a deficient number, since it is larger than the sum of its proper divisors (198662204).

218528332 is a wasteful number, since it uses less digits than its factorization.

218528332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4966568 (or 4966566 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 218528332 is about 14782.7038122260. The cubic root of 218528332 is about 602.3319729099.

The spelling of 218528332 in words is "two hundred eighteen million, five hundred twenty-eight thousand, three hundred thirty-two".