42185223 has 6 divisors (see below), whose sum is σ = 60934224. Its totient is φ = 28123476.

The previous prime is 42185219. The next prime is 42185233. The reversal of 42185223 is 32258124.

It is not a de Polignac number, because 42185223 - 2² = 42185219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42185233) 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 5 ways as a sum of consecutive naturals, for example, 2343615 + ... + 2343632.

It is an arithmetic number, because the mean of its divisors is an integer number (10155704).

Almost surely, 2^42185223 is an apocalyptic number.

42185223 is a deficient number, since it is larger than the sum of its proper divisors (18749001).

42185223 is a wasteful number, since it uses less digits than its factorization.

42185223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4687253 (or 4687250 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 42185223 is about 6495.0152424763. The cubic root of 42185223 is about 348.1128993577.

It can be divided in two parts, 421852 and 23, that added together give a cube (421875 = 75³).

The spelling of 42185223 in words is "forty-two million, one hundred eighty-five thousand, two hundred twenty-three".