31320323102213 has 4 divisors (see below), whose sum is σ = 33162695049420. Its totient is φ = 29477951155008.

The previous prime is 31320323102191. The next prime is 31320323102231. The reversal of 31320323102213 is 31220132302313.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11699259294724 + 19621063807489 = 3420418^2 + 4429567^2 .

It is a cyclic number.

It is not a de Polignac number, because 31320323102213 - 2¹⁴ = 31320323085829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320323102273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 921185973578 + ... + 921185973611.

It is an arithmetic number, because the mean of its divisors is an integer number (8290673762355).

Almost surely, 2^{31320323102213} is an apocalyptic number.

It is an amenable number.

31320323102213 is a deficient number, since it is larger than the sum of its proper divisors (1842371947207).

31320323102213 is a wasteful number, since it uses less digits than its factorization.

31320323102213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842371947206.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 31320323102213 its reverse (31220132302313), we get a palindrome (62540455404526).

The spelling of 31320323102213 in words is "thirty-one trillion, three hundred twenty billion, three hundred twenty-three million, one hundred two thousand, two hundred thirteen".