31344130304240 has 160 divisors (see below), whose sum is σ = 78677162672640. Its totient is φ = 11544307826688.

The previous prime is 31344130304167. The next prime is 31344130304243. The reversal of 31344130304240 is 4240303144313.

It is a junction number, because it is equal to n+sod(n) for n = 31344130304197 and 31344130304206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31344130304243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 706197089 + ... + 706241471.

It is an arithmetic number, because the mean of its divisors is an integer number (491732266704).

Almost surely, 2^{31344130304240} 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 31344130304240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39338581336320).

31344130304240 is an abundant number, since it is smaller than the sum of its proper divisors (47333032368400).

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

31344130304240 is a wasteful number, since it uses less digits than its factorization.

31344130304240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46091 (or 46085 counting only the distinct ones).

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

Adding to 31344130304240 its reverse (4240303144313), we get a palindrome (35584433448553).

The spelling of 31344130304240 in words is "thirty-one trillion, three hundred forty-four billion, one hundred thirty million, three hundred four thousand, two hundred forty".