311223445 has 16 divisors (see below), whose sum is σ = 402716160. Its totient is φ = 229529664.

The previous prime is 311223443. The next prime is 311223457. The reversal of 311223445 is 544322113.

It is not a de Polignac number, because 311223445 - 2¹ = 311223443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311223443) 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 15 ways as a sum of consecutive naturals, for example, 56316 + ... + 61594.

It is an arithmetic number, because the mean of its divisors is an integer number (25169760).

Almost surely, 2^311223445 is an apocalyptic number.

It is an amenable number.

311223445 is a deficient number, since it is larger than the sum of its proper divisors (91492715).

311223445 is a wasteful number, since it uses less digits than its factorization.

311223445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6204.

The product of its digits is 2880, while the sum is 25.

The square root of 311223445 is about 17641.5261528021. The cubic root of 311223445 is about 677.6791155072.

Adding to 311223445 its reverse (544322113), we get a palindrome (855545558).

The spelling of 311223445 in words is "three hundred eleven million, two hundred twenty-three thousand, four hundred forty-five".