218542342 has 8 divisors (see below), whose sum is σ = 332706456. Its totient is φ = 107640192.

The previous prime is 218542309. The next prime is 218542381. The reversal of 218542342 is 243245812.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815323 + ... + 815590.

It is an arithmetic number, because the mean of its divisors is an integer number (41588307).

Almost surely, 2^218542342 is an apocalyptic number.

218542342 is a deficient number, since it is larger than the sum of its proper divisors (114164114).

218542342 is a wasteful number, since it uses less digits than its factorization.

218542342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630982.

The product of its digits is 15360, while the sum is 31.

The square root of 218542342 is about 14783.1776692293. The cubic root of 218542342 is about 602.3448446057.

The spelling of 218542342 in words is "two hundred eighteen million, five hundred forty-two thousand, three hundred forty-two".