6311385 has 16 divisors (see below), whose sum is σ = 11220480. Its totient is φ = 3366000.

The previous prime is 6311381. The next prime is 6311387. The reversal of 6311385 is 5831136.

It is not a de Polignac number, because 6311385 - 2² = 6311381 is a prime.

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

6311385 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6311381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23241 + ... + 23510.

It is an arithmetic number, because the mean of its divisors is an integer number (701280).

Almost surely, 2^6311385 is an apocalyptic number.

It is an amenable number.

6311385 is a deficient number, since it is larger than the sum of its proper divisors (4909095).

6311385 is a wasteful number, since it uses less digits than its factorization.

6311385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46765 (or 46759 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 6311385 is about 2512.2470021875. The cubic root of 6311385 is about 184.8026627210.

Subtracting from 6311385 its reverse (5831136), we obtain a square (480249 = 693²).

It can be divided in two parts, 631 and 1385, that added together give a triangular number (2016 = T₆₃).

The spelling of 6311385 in words is "six million, three hundred eleven thousand, three hundred eighty-five".