6440211 has 6 divisors (see below), whose sum is σ = 9302540. Its totient is φ = 4293468.

The previous prime is 6440201. The next prime is 6440249. The reversal of 6440211 is 1120446.

6440211 is a `hidden beast` number, since 644 + 0 + 21 + 1 = 666.

It is not a de Polignac number, because 6440211 - 2⁵ = 6440179 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6440201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 357781 + ... + 357798.

Almost surely, 2^6440211 is an apocalyptic number.

6440211 is a deficient number, since it is larger than the sum of its proper divisors (2862329).

6440211 is a wasteful number, since it uses less digits than its factorization.

6440211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715585 (or 715582 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 6440211 is about 2537.7570805733. The cubic root of 6440211 is about 186.0515812544.

Adding to 6440211 its reverse (1120446), we get a palindrome (7560657).

The spelling of 6440211 in words is "six million, four hundred forty thousand, two hundred eleven".