31310120223 has 6 divisors (see below), whose sum is σ = 45225729224. Its totient is φ = 20873413476.

The previous prime is 31310120213. The next prime is 31310120227. The reversal of 31310120223 is 32202101313.

31310120223 is a `hidden beast` number, since 313 + 10 + 120 + 223 = 666.

It is not a de Polignac number, because 31310120223 - 2⁴ = 31310120207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31310120196 and 31310120205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31310120227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1739451115 + ... + 1739451132.

Almost surely, 2^31310120223 is an apocalyptic number.

31310120223 is a deficient number, since it is larger than the sum of its proper divisors (13915609001).

31310120223 is a wasteful number, since it uses less digits than its factorization.

31310120223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3478902253 (or 3478902250 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31310120223 its reverse (32202101313), we get a palindrome (63512221536).

The spelling of 31310120223 in words is "thirty-one billion, three hundred ten million, one hundred twenty thousand, two hundred twenty-three".