6440227 has 4 divisors (see below), whose sum is σ = 6483600. Its totient is φ = 6396856.

The previous prime is 6440201. The next prime is 6440249. The reversal of 6440227 is 7220446.

6440227 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 6440227 - 2⁷ = 6440099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6440327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21463 + ... + 21760.

It is an arithmetic number, because the mean of its divisors is an integer number (1620900).

Almost surely, 2^6440227 is an apocalyptic number.

6440227 is a deficient number, since it is larger than the sum of its proper divisors (43373).

6440227 is a wasteful number, since it uses less digits than its factorization.

6440227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43372.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 6440227 is about 2537.7602329613. The cubic root of 6440227 is about 186.0517353292.

The spelling of 6440227 in words is "six million, four hundred forty thousand, two hundred twenty-seven".