313224165 has 20 divisors (see below), whose sum is σ = 561484044. Its totient is φ = 167052672.

The previous prime is 313224161. The next prime is 313224173. The reversal of 313224165 is 561422313.

It can be written as a sum of positive squares in 2 ways, for example, as 173369889 + 139854276 = 13167^2 + 11826^2 .

It is not a de Polignac number, because 313224165 - 2² = 313224161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313224161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 386292 + ... + 387101.

Almost surely, 2^313224165 is an apocalyptic number.

It is an amenable number.

313224165 is a deficient number, since it is larger than the sum of its proper divisors (248259879).

313224165 is an equidigital number, since it uses as much as digits as its factorization.

313224165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773410 (or 773401 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 313224165 is about 17698.1401565249. The cubic root of 313224165 is about 679.1281827634.

Adding to 313224165 its reverse (561422313), we get a palindrome (874646478).

The spelling of 313224165 in words is "three hundred thirteen million, two hundred twenty-four thousand, one hundred sixty-five".