31023123223 has 4 divisors (see below), whose sum is σ = 31025539720. Its totient is φ = 31020706728.

The previous prime is 31023123211. The next prime is 31023123289. The reversal of 31023123223 is 32232132013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32232132013 = 20177 ⋅1597469.

It is a cyclic number.

It is not a de Polignac number, because 31023123223 - 2¹⁷ = 31022992151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31023123194 and 31023123203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023123623) 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, 1188888 + ... + 1214701.

It is an arithmetic number, because the mean of its divisors is an integer number (7756384930).

Almost surely, 2^31023123223 is an apocalyptic number.

31023123223 is a deficient number, since it is larger than the sum of its proper divisors (2416497).

31023123223 is a wasteful number, since it uses less digits than its factorization.

31023123223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2416496.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 31023123223 its reverse (32232132013), we get a palindrome (63255255236).

The spelling of 31023123223 in words is "thirty-one billion, twenty-three million, one hundred twenty-three thousand, two hundred twenty-three".