31432314220340 has 192 divisors, whose sum is σ = 76505554944000. Its totient is φ = 10720794839040.

The previous prime is 31432314220331. The next prime is 31432314220393. The reversal of 31432314220340 is 4302241323413.

It is a junction number, because it is equal to n+sod(n) for n = 31432314220297 and 31432314220306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1356759437 + ... + 1356782603.

It is an arithmetic number, because the mean of its divisors is an integer number (398466432000).

Almost surely, 2^{31432314220340} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31432314220340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38252777472000).

31432314220340 is an abundant number, since it is smaller than the sum of its proper divisors (45073240723660).

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

31432314220340 is a wasteful number, since it uses less digits than its factorization.

31432314220340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24430 (or 24428 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 31432314220340 its reverse (4302241323413), we get a palindrome (35734555543753).

The spelling of 31432314220340 in words is "thirty-one trillion, four hundred thirty-two billion, three hundred fourteen million, two hundred twenty thousand, three hundred forty".