318217042 has 32 divisors (see below), whose sum is σ = 565254144. Its totient is φ = 132451200.

The previous prime is 318217027. The next prime is 318217043. The reversal of 318217042 is 240712813.

It is a self number, because there is not a number n which added to its sum of digits gives 318217042.

It is not an unprimeable number, because it can be changed into a prime (318217043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31942 + ... + 40702.

It is an arithmetic number, because the mean of its divisors is an integer number (17664192).

Almost surely, 2^318217042 is an apocalyptic number.

318217042 is a deficient number, since it is larger than the sum of its proper divisors (247037102).

318217042 is a wasteful number, since it uses less digits than its factorization.

318217042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8914.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 318217042 is about 17838.6390175932. The cubic root of 318217042 is about 682.7176722987.

Adding to 318217042 its reverse (240712813), we get a palindrome (558929855).

The spelling of 318217042 in words is "three hundred eighteen million, two hundred seventeen thousand, forty-two".