311232321223 has 4 divisors (see below), whose sum is σ = 311271267328. Its totient is φ = 311193375120.

The previous prime is 311232321193. The next prime is 311232321233. The reversal of 311232321223 is 322123232113.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311232321223 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 (311232321233) 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, 19461063 + ... + 19477048.

It is an arithmetic number, because the mean of its divisors is an integer number (77817816832).

Almost surely, 2^311232321223 is an apocalyptic number.

311232321223 is a deficient number, since it is larger than the sum of its proper divisors (38946105).

311232321223 is an equidigital number, since it uses as much as digits as its factorization.

311232321223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38946104.

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

Adding to 311232321223 its reverse (322123232113), we get a palindrome (633355553336).

The spelling of 311232321223 in words is "three hundred eleven billion, two hundred thirty-two million, three hundred twenty-one thousand, two hundred twenty-three".