42543211 has 4 divisors (see below), whose sum is σ = 43532632. Its totient is φ = 41553792.

The previous prime is 42543187. The next prime is 42543269. The reversal of 42543211 is 11234524.

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 42543211 - 2⁹ = 42542699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42543511) 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, 494646 + ... + 494731.

It is an arithmetic number, because the mean of its divisors is an integer number (10883158).

Almost surely, 2^42543211 is an apocalyptic number.

42543211 is a deficient number, since it is larger than the sum of its proper divisors (989421).

42543211 is an equidigital number, since it uses as much as digits as its factorization.

42543211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989420.

The product of its digits is 960, while the sum is 22.

The square root of 42543211 is about 6522.5156956500. The cubic root of 42543211 is about 349.0948338765.

Adding to 42543211 its reverse (11234524), we get a palindrome (53777735).

The spelling of 42543211 in words is "forty-two million, five hundred forty-three thousand, two hundred eleven".