218194122 has 16 divisors (see below), whose sum is σ = 436831200. Its totient is φ = 72657552.

The previous prime is 218194061. The next prime is 218194139. The reversal of 218194122 is 221491812.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 218194122.

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, 11872 + ... + 24027.

It is an arithmetic number, because the mean of its divisors is an integer number (27301950).

Almost surely, 2^218194122 is an apocalyptic number.

218194122 is an abundant number, since it is smaller than the sum of its proper divisors (218637078).

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

218194122 is a wasteful number, since it uses less digits than its factorization.

218194122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36917.

The product of its digits is 2304, while the sum is 30.

The square root of 218194122 is about 14771.3953978627. The cubic root of 218194122 is about 602.0247540437.

The spelling of 218194122 in words is "two hundred eighteen million, one hundred ninety-four thousand, one hundred twenty-two".