311313223 has 4 divisors (see below), whose sum is σ = 335260408. Its totient is φ = 287366040.

The previous prime is 311313181. The next prime is 311313241. The reversal of 311313223 is 322313113.

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

It is a de Polignac number, because none of the positive numbers 2^k-311313223 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 311313223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311313283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11973573 + ... + 11973598.

It is an arithmetic number, because the mean of its divisors is an integer number (83815102).

Almost surely, 2^311313223 is an apocalyptic number.

311313223 is a deficient number, since it is larger than the sum of its proper divisors (23947185).

311313223 is a wasteful number, since it uses less digits than its factorization.

311313223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23947184.

The product of its digits is 324, while the sum is 19.

The square root of 311313223 is about 17644.0704770753. The cubic root of 311313223 is about 677.7442721520.

Adding to 311313223 its reverse (322313113), we get a palindrome (633626336).

The spelling of 311313223 in words is "three hundred eleven million, three hundred thirteen thousand, two hundred twenty-three".