3111312223 has 4 divisors (see below), whose sum is σ = 3112384680. Its totient is φ = 3110239768.

The previous prime is 3111312173. The next prime is 3111312227. The reversal of 3111312223 is 3222131113.

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 3111312223 - 2²¹ = 3109215071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3111312223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3111312227) 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, 531865 + ... + 537682.

It is an arithmetic number, because the mean of its divisors is an integer number (778096170).

Almost surely, 2^3111312223 is an apocalyptic number.

3111312223 is a deficient number, since it is larger than the sum of its proper divisors (1072457).

3111312223 is a wasteful number, since it uses less digits than its factorization.

3111312223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072456.

The product of its digits is 216, while the sum is 19.

The square root of 3111312223 is about 55779.1378832624. The cubic root of 3111312223 is about 1459.8711688098.

Adding to 3111312223 its reverse (3222131113), we get a palindrome (6333443336).

The spelling of 3111312223 in words is "three billion, one hundred eleven million, three hundred twelve thousand, two hundred twenty-three".