31131301111223 has 32 divisors (see below), whose sum is σ = 32192050968000. Its totient is φ = 30085802905600.

The previous prime is 31131301111217. The next prime is 31131301111241. The reversal of 31131301111223 is 32211110313113.

It is not a de Polignac number, because 31131301111223 - 2⁶ = 31131301111159 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 (31131301111423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13009318115 + ... + 13009320507.

It is an arithmetic number, because the mean of its divisors is an integer number (1006001592750).

Almost surely, 2^{31131301111223} is an apocalyptic number.

31131301111223 is a deficient number, since it is larger than the sum of its proper divisors (1060749856777).

31131301111223 is a wasteful number, since it uses less digits than its factorization.

31131301111223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5923.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 31131301111223 its reverse (32211110313113), we get a palindrome (63342411424336).

The spelling of 31131301111223 in words is "thirty-one trillion, one hundred thirty-one billion, three hundred one million, one hundred eleven thousand, two hundred twenty-three".