218211190 has 8 divisors (see below), whose sum is σ = 392780160. Its totient is φ = 87284472.

The previous prime is 218211137. The next prime is 218211211. The reversal of 218211190 is 91112812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×218211190² = 95232246882432200, which contains 22 as substring.

It is a congruent number.

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, 10910550 + ... + 10910569.

It is an arithmetic number, because the mean of its divisors is an integer number (49097520).

Almost surely, 2^218211190 is an apocalyptic number.

218211190 is a deficient number, since it is larger than the sum of its proper divisors (174568970).

218211190 is a wasteful number, since it uses less digits than its factorization.

218211190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21821126.

The product of its (nonzero) digits is 288, while the sum is 25.

The square root of 218211190 is about 14771.9731248063. The cubic root of 218211190 is about 602.0404512135.

The spelling of 218211190 in words is "two hundred eighteen million, two hundred eleven thousand, one hundred ninety".