31440143042 has 64 divisors (see below), whose sum is σ = 59495627520. Its totient is φ = 12104294400.

The previous prime is 31440143039. The next prime is 31440143057. The reversal of 31440143042 is 24034104413.

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 31 ways as a sum of consecutive naturals, for example, 13159184 + ... + 13161572.

It is an arithmetic number, because the mean of its divisors is an integer number (929619180).

Almost surely, 2^31440143042 is an apocalyptic number.

31440143042 is a deficient number, since it is larger than the sum of its proper divisors (28055484478).

31440143042 is a wasteful number, since it uses less digits than its factorization.

31440143042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3387.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 31440143042 its reverse (24034104413), we get a palindrome (55474247455).

The spelling of 31440143042 in words is "thirty-one billion, four hundred forty million, one hundred forty-three thousand, forty-two".