1311000223 has 4 divisors (see below), whose sum is σ = 1411846408. Its totient is φ = 1210154040.

The previous prime is 1311000221. The next prime is 1311000239. The reversal of 1311000223 is 3220001131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3220001131 = 45751 ⋅70381.

It is a cyclic number.

It is not a de Polignac number, because 1311000223 - 2¹ = 1311000221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 100846171 = 1311000223 / (1 + 3 + 1 + 1 + 0 + 0 + 0 + 2 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311000221) 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, 50423073 + ... + 50423098.

It is an arithmetic number, because the mean of its divisors is an integer number (352961602).

Almost surely, 2^1311000223 is an apocalyptic number.

1311000223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1311000223 is a deficient number, since it is larger than the sum of its proper divisors (100846185).

1311000223 is a wasteful number, since it uses less digits than its factorization.

1311000223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100846184.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1311000223 is about 36207.7370599158. The cubic root of 1311000223 is about 1094.4625909717.

Adding to 1311000223 its reverse (3220001131), we get a palindrome (4531001354).

The spelling of 1311000223 in words is "one billion, three hundred eleven million, two hundred twenty-three", and thus it is an aban number.