31440143534 has 8 divisors (see below), whose sum is σ = 47161523208. Its totient is φ = 15719635800.

The previous prime is 31440143509. The next prime is 31440143557. The reversal of 31440143534 is 43534104413.

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 31440143534.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118817 + ... + 277484.

It is an arithmetic number, because the mean of its divisors is an integer number (5895190401).

Almost surely, 2^31440143534 is an apocalyptic number.

31440143534 is a deficient number, since it is larger than the sum of its proper divisors (15721379674).

31440143534 is a wasteful number, since it uses less digits than its factorization.

31440143534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435970.

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 31440143534 its reverse (43534104413), we get a palindrome (74974247947).

The spelling of 31440143534 in words is "thirty-one billion, four hundred forty million, one hundred forty-three thousand, five hundred thirty-four".