218399852 has 12 divisors (see below), whose sum is σ = 416945256. Its totient is φ = 99272640.

The previous prime is 218399837. The next prime is 218399897. The reversal of 218399852 is 258993812.

It is a junction number, because it is equal to n+sod(n) for n = 218399797 and 218399806.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2481773 + ... + 2481860.

It is an arithmetic number, because the mean of its divisors is an integer number (34745438).

Almost surely, 2^218399852 is an apocalyptic number.

218399852 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

218399852 is a deficient number, since it is larger than the sum of its proper divisors (198545404).

218399852 is a wasteful number, since it uses less digits than its factorization.

218399852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4963648 (or 4963646 counting only the distinct ones).

The product of its digits is 311040, while the sum is 47.

The square root of 218399852 is about 14778.3575542074. The cubic root of 218399852 is about 602.2139061702.

The spelling of 218399852 in words is "two hundred eighteen million, three hundred ninety-nine thousand, eight hundred fifty-two".