31230242340 has 288 divisors, whose sum is σ = 98777677824. Its totient is φ = 7310096640.

The previous prime is 31230242339. The next prime is 31230242359. The reversal of 31230242340 is 4324203213.

It is a self number, because there is not a number n which added to its sum of digits gives 31230242340.

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 95 ways as a sum of consecutive naturals, for example, 245907357 + ... + 245907483.

It is an arithmetic number, because the mean of its divisors is an integer number (342978048).

Almost surely, 2^31230242340 is an apocalyptic number.

31230242340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31230242340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49388838912).

31230242340 is an abundant number, since it is smaller than the sum of its proper divisors (67547435484).

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

31230242340 is a wasteful number, since it uses less digits than its factorization.

31230242340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 31230242340 its reverse (4324203213), we get a palindrome (35554445553).

The spelling of 31230242340 in words is "thirty-one billion, two hundred thirty million, two hundred forty-two thousand, three hundred forty".