42173211 has 4 divisors (see below), whose sum is σ = 56230952. Its totient is φ = 28115472.

The previous prime is 42173189. The next prime is 42173231. The reversal of 42173211 is 11237124.

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

It is not a de Polignac number, because 42173211 - 2¹⁰ = 42172187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42173231) 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, 7028866 + ... + 7028871.

It is an arithmetic number, because the mean of its divisors is an integer number (14057738).

Almost surely, 2^42173211 is an apocalyptic number.

42173211 is a deficient number, since it is larger than the sum of its proper divisors (14057741).

42173211 is a wasteful number, since it uses less digits than its factorization.

42173211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14057740.

The product of its digits is 336, while the sum is 21.

The square root of 42173211 is about 6494.0904674943. The cubic root of 42173211 is about 348.0798551715.

The spelling of 42173211 in words is "forty-two million, one hundred seventy-three thousand, two hundred eleven".