42644233 has 4 divisors (see below), whose sum is σ = 43244928. Its totient is φ = 42043540.

The previous prime is 42644219. The next prime is 42644237. The reversal of 42644233 is 33244624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42644233 - 2⁵ = 42644201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42644237) 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 3 ways as a sum of consecutive naturals, for example, 300241 + ... + 300382.

It is an arithmetic number, because the mean of its divisors is an integer number (10811232).

Almost surely, 2^42644233 is an apocalyptic number.

It is an amenable number.

42644233 is a deficient number, since it is larger than the sum of its proper divisors (600695).

42644233 is an equidigital number, since it uses as much as digits as its factorization.

42644233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600694.

The product of its digits is 13824, while the sum is 28.

The square root of 42644233 is about 6530.2552017513. The cubic root of 42644233 is about 349.3709326174.

Adding to 42644233 its reverse (33244624), we get a palindrome (75888857).

The spelling of 42644233 in words is "forty-two million, six hundred forty-four thousand, two hundred thirty-three".