31313323330000 has 100 divisors (see below), whose sum is σ = 78426918430740. Its totient is φ = 12093421312000.

The previous prime is 31313323329991. The next prime is 31313323330007. The reversal of 31313323330000 is 3332331313.

It can be written as a sum of positive squares in 10 ways, for example, as 12089167394704 + 19224155935296 = 3476948^2 + 4384536^2 .

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313323330007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 53698489 + ... + 54278488.

Almost surely, 2^{31313323330000} is an apocalyptic number.

It is an amenable number.

31313323330000 is an abundant number, since it is smaller than the sum of its proper divisors (47113595100740).

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

31313323330000 is a wasteful number, since it uses less digits than its factorization.

31313323330000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107977034 (or 107977013 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 25.

Adding to 31313323330000 its reverse (3332331313), we get a palindrome (31316655661313).

The spelling of 31313323330000 in words is "thirty-one trillion, three hundred thirteen billion, three hundred twenty-three million, three hundred thirty thousand".