6442231 has 4 divisors (see below), whose sum is σ = 6722352. Its totient is φ = 6162112.

The previous prime is 6442223. The next prime is 6442237. The reversal of 6442231 is 1322446.

It is a happy number.

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 6442231 - 2³ = 6442223 is a prime.

It is a super-2 number, since 2×6442231² = 83004680514722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6442237) by changing a digit.

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, 140026 + ... + 140071.

It is an arithmetic number, because the mean of its divisors is an integer number (1680588).

Almost surely, 2^6442231 is an apocalyptic number.

6442231 is a deficient number, since it is larger than the sum of its proper divisors (280121).

6442231 is a wasteful number, since it uses less digits than its factorization.

6442231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280120.

The product of its digits is 1152, while the sum is 22.

The square root of 6442231 is about 2538.1550386058. The cubic root of 6442231 is about 186.0710311818.

Adding to 6442231 its reverse (1322446), we get a palindrome (7764677).

The spelling of 6442231 in words is "six million, four hundred forty-two thousand, two hundred thirty-one".