218877242 has 8 divisors (see below), whose sum is σ = 332472000. Its totient is φ = 108053244.

The previous prime is 218877221. The next prime is 218877251. The reversal of 218877242 is 242778812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 218877242.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692492 + ... + 692807.

It is an arithmetic number, because the mean of its divisors is an integer number (41559000).

Almost surely, 2^218877242 is an apocalyptic number.

218877242 is a deficient number, since it is larger than the sum of its proper divisors (113594758).

218877242 is a wasteful number, since it uses less digits than its factorization.

218877242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385380.

The product of its digits is 100352, while the sum is 41.

The square root of 218877242 is about 14794.5003971070. The cubic root of 218877242 is about 602.6523705695.

The spelling of 218877242 in words is "two hundred eighteen million, eight hundred seventy-seven thousand, two hundred forty-two".