31240331300000 has 288 divisors, whose sum is σ = 80426637365760. Its totient is φ = 11931884800000.

The previous prime is 31240331299993. The next prime is 31240331300051. The reversal of 31240331300000 is 313304213.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 192618941 + ... + 192781059.

It is an arithmetic number, because the mean of its divisors is an integer number (279259157520).

Almost surely, 2^{31240331300000} 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 31240331300000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40213318682880).

31240331300000 is an abundant number, since it is smaller than the sum of its proper divisors (49186306065760).

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

31240331300000 is an equidigital number, since it uses as much as digits as its factorization.

31240331300000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162242 (or 162214 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31240331300000 its reverse (313304213), we get a palindrome (31240644604213).

The spelling of 31240331300000 in words is "thirty-one trillion, two hundred forty billion, three hundred thirty-one million, three hundred thousand".