1311755223 has 4 divisors (see below), whose sum is σ = 1749006968. Its totient is φ = 874503480.

The previous prime is 1311755197. The next prime is 1311755227. The reversal of 1311755223 is 3225571131.

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

It is not a de Polignac number, because 1311755223 - 2⁸ = 1311754967 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 (1311755227) 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, 218625868 + ... + 218625873.

It is an arithmetic number, because the mean of its divisors is an integer number (437251742).

Almost surely, 2^1311755223 is an apocalyptic number.

1311755223 is a deficient number, since it is larger than the sum of its proper divisors (437251745).

1311755223 is an equidigital number, since it uses as much as digits as its factorization.

1311755223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437251744.

The product of its digits is 6300, while the sum is 30.

The square root of 1311755223 is about 36218.1615077298. The cubic root of 1311755223 is about 1094.6726495889.

The spelling of 1311755223 in words is "one billion, three hundred eleven million, seven hundred fifty-five thousand, two hundred twenty-three".