318231442 has 16 divisors (see below), whose sum is σ = 494265240. Its totient is φ = 153486592.

The previous prime is 318231439. The next prime is 318231467. The reversal of 318231442 is 244132813.

It can be written as a sum of positive squares in 4 ways, for example, as 260790201 + 57441241 = 16149^2 + 7579^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 318231442.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 88308 + ... + 91840.

Almost surely, 2^318231442 is an apocalyptic number.

318231442 is a deficient number, since it is larger than the sum of its proper divisors (176033798).

318231442 is a wasteful number, since it uses less digits than its factorization.

318231442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5117.

The product of its digits is 4608, while the sum is 28.

The square root of 318231442 is about 17839.0426312625. The cubic root of 318231442 is about 682.7279702871.

The spelling of 318231442 in words is "three hundred eighteen million, two hundred thirty-one thousand, four hundred forty-two".