31443121342 has 8 divisors (see below), whose sum is σ = 47218464216. Its totient is φ = 15703633272.

The previous prime is 31443121319. The next prime is 31443121387. The reversal of 31443121342 is 24312134413.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31443121342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8961508 + ... + 8965015.

It is an arithmetic number, because the mean of its divisors is an integer number (5902308027).

Almost surely, 2^31443121342 is an apocalyptic number.

31443121342 is a deficient number, since it is larger than the sum of its proper divisors (15775342874).

31443121342 is a wasteful number, since it uses less digits than its factorization.

31443121342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17927402.

The product of its digits is 6912, while the sum is 28.

Adding to 31443121342 its reverse (24312134413), we get a palindrome (55755255755).

The spelling of 31443121342 in words is "thirty-one billion, four hundred forty-three million, one hundred twenty-one thousand, three hundred forty-two".