218466212 has 24 divisors (see below), whose sum is σ = 390700800. Its totient is φ = 106850016.

The previous prime is 218466197. The next prime is 218466217. The reversal of 218466212 is 212664812.

It is not an unprimeable number, because it can be changed into a prime (218466217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78989 + ... + 81707.

It is an arithmetic number, because the mean of its divisors is an integer number (16279200).

Almost surely, 2^218466212 is an apocalyptic number.

It is an amenable number.

218466212 is a deficient number, since it is larger than the sum of its proper divisors (172234588).

218466212 is a wasteful number, since it uses less digits than its factorization.

218466212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155 (or 3153 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 218466212 is about 14780.6025587592. The cubic root of 218466212 is about 602.2748934948.

The spelling of 218466212 in words is "two hundred eighteen million, four hundred sixty-six thousand, two hundred twelve".