218144166 has 16 divisors (see below), whose sum is σ = 437151600. Its totient is φ = 72570848.

The previous prime is 218144137. The next prime is 218144183. The reversal of 218144166 is 661441812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32661 + ... + 38768.

It is an arithmetic number, because the mean of its divisors is an integer number (27321975).

Almost surely, 2^218144166 is an apocalyptic number.

218144166 is an abundant number, since it is smaller than the sum of its proper divisors (219007434).

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

218144166 is a wasteful number, since it uses less digits than its factorization.

218144166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71943.

The product of its digits is 9216, while the sum is 33.

The square root of 218144166 is about 14769.7043301483. The cubic root of 218144166 is about 601.9788055952.

Adding to 218144166 its reverse (661441812), we get a palindrome (879585978).

The spelling of 218144166 in words is "two hundred eighteen million, one hundred forty-four thousand, one hundred sixty-six".