31343404340 has 96 divisors (see below), whose sum is σ = 71240547840. Its totient is φ = 11545027200.

The previous prime is 31343404327. The next prime is 31343404349. The reversal of 31343404340 is 4340434313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31343404349) by changing a digit.

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, 3443195 + ... + 3452285.

It is an arithmetic number, because the mean of its divisors is an integer number (742089040).

Almost surely, 2^31343404340 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 31343404340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35620273920).

31343404340 is an abundant number, since it is smaller than the sum of its proper divisors (39897143500).

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

31343404340 is a wasteful number, since it uses less digits than its factorization.

31343404340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9373 (or 9371 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 31343404340 its reverse (4340434313), we get a palindrome (35683838653).

The spelling of 31343404340 in words is "thirty-one billion, three hundred forty-three million, four hundred four thousand, three hundred forty".