42224186 has 4 divisors (see below), whose sum is σ = 63336282. Its totient is φ = 21112092.

The previous prime is 42224183. The next prime is 42224207. The reversal of 42224186 is 68142224.

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

It can be written as a sum of positive squares in only one way, i.e., 32706961 + 9517225 = 5719^2 + 3085^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42224183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556045 + ... + 10556048.

Almost surely, 2^42224186 is an apocalyptic number.

42224186 is a deficient number, since it is larger than the sum of its proper divisors (21112096).

42224186 is a wasteful number, since it uses less digits than its factorization.

42224186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21112095.

The product of its digits is 6144, while the sum is 29.

The square root of 42224186 is about 6498.0140042939. The cubic root of 42224186 is about 348.2200407392.

The spelling of 42224186 in words is "forty-two million, two hundred twenty-four thousand, one hundred eighty-six".