31222313311313 has 4 divisors (see below), whose sum is σ = 31223906549940. Its totient is φ = 31220720072688.

The previous prime is 31222313311283. The next prime is 31222313311327. The reversal of 31222313311313 is 31311331322213.

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 22382436696064 + 8839876615249 = 4731008^2 + 2973193^2 .

It is a cyclic number.

It is not a de Polignac number, because 31222313311313 - 2¹⁰ = 31222313310289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31222313311213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 796589918 + ... + 796629111.

It is an arithmetic number, because the mean of its divisors is an integer number (7805976637485).

Almost surely, 2^{31222313311313} is an apocalyptic number.

It is an amenable number.

31222313311313 is a deficient number, since it is larger than the sum of its proper divisors (1593238627).

31222313311313 is a wasteful number, since it uses less digits than its factorization.

31222313311313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593238626.

The product of its digits is 5832, while the sum is 29.

Adding to 31222313311313 its reverse (31311331322213), we get a palindrome (62533644633526).

The spelling of 31222313311313 in words is "thirty-one trillion, two hundred twenty-two billion, three hundred thirteen million, three hundred eleven thousand, three hundred thirteen".