6381355 has 4 divisors (see below), whose sum is σ = 7657632. Its totient is φ = 5105080.

The previous prime is 6381343. The next prime is 6381371. The reversal of 6381355 is 5531836.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6381355 - 2⁷ = 6381227 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 638131 + ... + 638140.

It is an arithmetic number, because the mean of its divisors is an integer number (1914408).

Almost surely, 2^6381355 is an apocalyptic number.

6381355 is a deficient number, since it is larger than the sum of its proper divisors (1276277).

6381355 is a wasteful number, since it uses less digits than its factorization.

6381355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276276.

The product of its digits is 10800, while the sum is 31.

The square root of 6381355 is about 2526.1343986415. The cubic root of 6381355 is about 185.4830812593.

It can be divided in two parts, 63 and 81355, that added together give a palindrome (81418).

The spelling of 6381355 in words is "six million, three hundred eighty-one thousand, three hundred fifty-five".