42221178 has 24 divisors (see below), whose sum is σ = 93207348. Its totient is φ = 13807872.

The previous prime is 42221147. The next prime is 42221197. The reversal of 42221178 is 87112224.

42221178 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 36036009 + 6185169 = 6003^2 + 2487^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21175 + ... + 23082.

Almost surely, 2^42221178 is an apocalyptic number.

42221178 is an abundant number, since it is smaller than the sum of its proper divisors (50986170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42221178 is a wasteful number, since it uses less digits than its factorization.

42221178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44318 (or 44315 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 42221178 is about 6497.7825448379. The cubic root of 42221178 is about 348.2117716178.

The spelling of 42221178 in words is "forty-two million, two hundred twenty-one thousand, one hundred seventy-eight".