31320331605243 has 12 divisors (see below), whose sum is σ = 45240528808488. Its totient is φ = 20880198074880.

The previous prime is 31320331605217. The next prime is 31320331605247. The reversal of 31320331605243 is 34250613302313.

31320331605243 is a `hidden beast` number, since 3 + 1 + 3 + 2 + 0 + 3 + 3 + 1 + 605 + 2 + 43 = 666.

It is not a de Polignac number, because 31320331605243 - 2⁶ = 31320331605179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31320331605198 and 31320331605207.

It is not an unprimeable number, because it can be changed into a prime (31320331605247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12124888 + ... + 14479418.

It is an arithmetic number, because the mean of its divisors is an integer number (3770044067374).

Almost surely, 2^{31320331605243} is an apocalyptic number.

31320331605243 is a deficient number, since it is larger than the sum of its proper divisors (13920197203245).

31320331605243 is a wasteful number, since it uses less digits than its factorization.

31320331605243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3832554 (or 3832551 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 36.

Adding to 31320331605243 its reverse (34250613302313), we get a palindrome (65570944907556).

The spelling of 31320331605243 in words is "thirty-one trillion, three hundred twenty billion, three hundred thirty-one million, six hundred five thousand, two hundred forty-three".