218145022 has 4 divisors (see below), whose sum is σ = 327217536. Its totient is φ = 109072510.

The previous prime is 218145017. The next prime is 218145029. The reversal of 218145022 is 220541812.

218145022 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218145029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54536254 + ... + 54536257.

It is an arithmetic number, because the mean of its divisors is an integer number (81804384).

Almost surely, 2^218145022 is an apocalyptic number.

218145022 is a deficient number, since it is larger than the sum of its proper divisors (109072514).

218145022 is a wasteful number, since it uses less digits than its factorization.

218145022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109072513.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 218145022 is about 14769.7333083573. The cubic root of 218145022 is about 601.9795929845.

Adding to 218145022 its reverse (220541812), we get a palindrome (438686834).

The spelling of 218145022 in words is "two hundred eighteen million, one hundred forty-five thousand, twenty-two".