31320313301031 has 4 divisors (see below), whose sum is σ = 41760417734712. Its totient is φ = 20880208867352.

The previous prime is 31320313300993. The next prime is 31320313301089. The reversal of 31320313301031 is 13010331302313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31320313301031 - 2¹⁸ = 31320313038887 is a prime.

It is a super-2 number, since 2×31320313301031² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31320313300992 and 31320313301010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320313301731) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5220052216836 + ... + 5220052216841.

It is an arithmetic number, because the mean of its divisors is an integer number (10440104433678).

Almost surely, 2^{31320313301031} is an apocalyptic number.

31320313301031 is a deficient number, since it is larger than the sum of its proper divisors (10440104433681).

31320313301031 is a wasteful number, since it uses less digits than its factorization.

31320313301031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10440104433680.

The product of its (nonzero) digits is 1458, while the sum is 24.

Adding to 31320313301031 its reverse (13010331302313), we get a palindrome (44330644603344).

The spelling of 31320313301031 in words is "thirty-one trillion, three hundred twenty billion, three hundred thirteen million, three hundred one thousand, thirty-one".