218872245 has 64 divisors (see below), whose sum is σ = 376233984. Its totient is φ = 108476160.

The previous prime is 218872243. The next prime is 218872249. The reversal of 218872245 is 542278812.

It is not a de Polignac number, because 218872245 - 2¹ = 218872243 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218872243) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2045482 + ... + 2045588.

It is an arithmetic number, because the mean of its divisors is an integer number (5878656).

Almost surely, 2^218872245 is an apocalyptic number.

It is an amenable number.

218872245 is a deficient number, since it is larger than the sum of its proper divisors (157361739).

218872245 is a wasteful number, since it uses less digits than its factorization.

218872245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282.

The product of its digits is 71680, while the sum is 39.

The square root of 218872245 is about 14794.3315158205. The cubic root of 218872245 is about 602.6477843202.

The spelling of 218872245 in words is "two hundred eighteen million, eight hundred seventy-two thousand, two hundred forty-five".