311223103 has 4 divisors (see below), whose sum is σ = 311260320. Its totient is φ = 311185888.

The previous prime is 311223083. The next prime is 311223149. The reversal of 311223103 is 301322113.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 301322113 = 43 ⋅7007491.

It is a cyclic number.

It is not a de Polignac number, because 311223103 - 2⁵ = 311223071 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 (311221103) 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, 426 + ... + 24952.

It is an arithmetic number, because the mean of its divisors is an integer number (77815080).

Almost surely, 2^311223103 is an apocalyptic number.

311223103 is a deficient number, since it is larger than the sum of its proper divisors (37217).

311223103 is a wasteful number, since it uses less digits than its factorization.

311223103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37216.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 311223103 is about 17641.5164597605. The cubic root of 311223103 is about 677.6788672758.

Adding to 311223103 its reverse (301322113), we get a palindrome (612545216).

It can be divided in two parts, 31122 and 3103, that added together give a square (34225 = 185²).

The spelling of 311223103 in words is "three hundred eleven million, two hundred twenty-three thousand, one hundred three".