218671242 has 8 divisors (see below), whose sum is σ = 437342496. Its totient is φ = 72890412.

The previous prime is 218671217. The next prime is 218671273. The reversal of 218671242 is 242176812.

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

218671242 is an admirable number.

It is a super-2 number, since 2×218671242² = 95634224155645128, which contains 22 as substring.

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, 18222598 + ... + 18222609.

It is an arithmetic number, because the mean of its divisors is an integer number (54667812).

Almost surely, 2^218671242 is an apocalyptic number.

218671242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

218671242 is a wasteful number, since it uses less digits than its factorization.

218671242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36445212.

The product of its digits is 10752, while the sum is 33.

The square root of 218671242 is about 14787.5367117042. The cubic root of 218671242 is about 602.4632457507.

The spelling of 218671242 in words is "two hundred eighteen million, six hundred seventy-one thousand, two hundred forty-two".