1311333223 has 4 divisors (see below), whose sum is σ = 1356551640. Its totient is φ = 1266114808.

The previous prime is 1311333181. The next prime is 1311333227. The reversal of 1311333223 is 3223331131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3223331131 = 103 ⋅31294477.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311333223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311333194 and 1311333203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311333227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22609165 + ... + 22609222.

It is an arithmetic number, because the mean of its divisors is an integer number (339137910).

Almost surely, 2^1311333223 is an apocalyptic number.

1311333223 is a deficient number, since it is larger than the sum of its proper divisors (45218417).

1311333223 is an equidigital number, since it uses as much as digits as its factorization.

1311333223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45218416.

The product of its digits is 972, while the sum is 22.

The square root of 1311333223 is about 36212.3352326248. The cubic root of 1311333223 is about 1094.5552492802. Note that the first 3 decimals are identical.

Adding to 1311333223 its reverse (3223331131), we get a palindrome (4534664354).

The spelling of 1311333223 in words is "one billion, three hundred eleven million, three hundred thirty-three thousand, two hundred twenty-three".