311223385 has 16 divisors (see below), whose sum is σ = 407776320. Its totient is φ = 226146240.

The previous prime is 311223383. The next prime is 311223397. The reversal of 311223385 is 583322113.

It is not a de Polignac number, because 311223385 - 2¹ = 311223383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (311223383) 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, 96814 + ... + 99976.

It is an arithmetic number, because the mean of its divisors is an integer number (25486020).

Almost surely, 2^311223385 is an apocalyptic number.

It is an amenable number.

311223385 is a deficient number, since it is larger than the sum of its proper divisors (96552935).

311223385 is a wasteful number, since it uses less digits than its factorization.

311223385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4968.

The product of its digits is 4320, while the sum is 28.

The square root of 311223385 is about 17641.5244522689. The cubic root of 311223385 is about 677.6790719578.

Adding to 311223385 its reverse (583322113), we get a palindrome (894545498).

The spelling of 311223385 in words is "three hundred eleven million, two hundred twenty-three thousand, three hundred eighty-five".