1311420223 has 20 divisors (see below), whose sum is σ = 1436136840. Its totient is φ = 1196099856.

The previous prime is 1311420217. The next prime is 1311420269. The reversal of 1311420223 is 3220241131.

It is a happy number.

It is not a de Polignac number, because 1311420223 - 2⁵ = 1311420191 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 1311420223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311420203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3779136 + ... + 3779482.

It is an arithmetic number, because the mean of its divisors is an integer number (71806842).

Almost surely, 2^1311420223 is an apocalyptic number.

1311420223 is a deficient number, since it is larger than the sum of its proper divisors (124716617).

1311420223 is an frugal number, since it uses more digits than its factorization.

1311420223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1311420223 is about 36213.5364608319. The cubic root of 1311420223 is about 1094.5794547222.

Adding to 1311420223 its reverse (3220241131), we get a palindrome (4531661354).

The spelling of 1311420223 in words is "one billion, three hundred eleven million, four hundred twenty thousand, two hundred twenty-three".