31311234223 has 4 divisors (see below), whose sum is σ = 31707579040. Its totient is φ = 30914889408.

The previous prime is 31311234221. The next prime is 31311234239. The reversal of 31311234223 is 32243211313.

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

It is a cyclic number.

It is not a de Polignac number, because 31311234223 - 2¹ = 31311234221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311234221) 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, 198172290 + ... + 198172447.

It is an arithmetic number, because the mean of its divisors is an integer number (7926894760).

Almost surely, 2^31311234223 is an apocalyptic number.

31311234223 is a deficient number, since it is larger than the sum of its proper divisors (396344817).

31311234223 is an equidigital number, since it uses as much as digits as its factorization.

31311234223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396344816.

The product of its digits is 2592, while the sum is 25.

Adding to 31311234223 its reverse (32243211313), we get a palindrome (63554445536).

The spelling of 31311234223 in words is "thirty-one billion, three hundred eleven million, two hundred thirty-four thousand, two hundred twenty-three".