31440143442 has 16 divisors (see below), whose sum is σ = 62882101440. Its totient is φ = 10479745392.

The previous prime is 31440143419. The next prime is 31440143473. The reversal of 31440143442 is 24434104413.

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, 273984 + ... + 371412.

It is an arithmetic number, because the mean of its divisors is an integer number (3930131340).

Almost surely, 2^31440143442 is an apocalyptic number.

31440143442 is an abundant number, since it is smaller than the sum of its proper divisors (31441957998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31440143442 is a wasteful number, since it uses less digits than its factorization.

31440143442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151217.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 31440143442 its reverse (24434104413), we get a palindrome (55874247855).

The spelling of 31440143442 in words is "thirty-one billion, four hundred forty million, one hundred forty-three thousand, four hundred forty-two".