42273218 has 32 divisors (see below), whose sum is σ = 71801856. Its totient is φ = 18520128.

The previous prime is 42273193. The next prime is 42273223. The reversal of 42273218 is 81237224.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a cake number, because a cake can be divided into 42273218 parts by 633 planar cuts.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133196 + ... + 133512.

It is an arithmetic number, because the mean of its divisors is an integer number (2243808).

Almost surely, 2^42273218 is an apocalyptic number.

42273218 is a deficient number, since it is larger than the sum of its proper divisors (29528638).

42273218 is a wasteful number, since it uses less digits than its factorization.

42273218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578.

The product of its digits is 5376, while the sum is 29.

The square root of 42273218 is about 6501.7857546985. The cubic root of 42273218 is about 348.3547764755.

The spelling of 42273218 in words is "forty-two million, two hundred seventy-three thousand, two hundred eighteen".