31310313223 has 4 divisors (see below), whose sum is σ = 35783215120. Its totient is φ = 26837411328.

The previous prime is 31310313211. The next prime is 31310313253. The reversal of 31310313223 is 32231301313.

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

It is not a de Polignac number, because 31310313223 - 2⁵ = 31310313191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31310313194 and 31310313203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31310313253) 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, 2236450938 + ... + 2236450951.

It is an arithmetic number, because the mean of its divisors is an integer number (8945803780).

Almost surely, 2^31310313223 is an apocalyptic number.

31310313223 is a deficient number, since it is larger than the sum of its proper divisors (4472901897).

31310313223 is an equidigital number, since it uses as much as digits as its factorization.

31310313223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4472901896.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31310313223 its reverse (32231301313), we get a palindrome (63541614536).

The spelling of 31310313223 in words is "thirty-one billion, three hundred ten million, three hundred thirteen thousand, two hundred twenty-three".