842228181 has 24 divisors (see below), whose sum is σ = 1321898240. Its totient is φ = 514771200.

The previous prime is 842228173. The next prime is 842228197. The reversal of 842228181 is 181822248.

842228181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 842228181 - 2³ = 842228173 is a prime.

It is a super-2 number, since 2×842228181² = 1418696617741137522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842228111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74140 + ... + 84741.

Almost surely, 2^842228181 is an apocalyptic number.

It is an amenable number.

842228181 is a deficient number, since it is larger than the sum of its proper divisors (479670059).

842228181 is a wasteful number, since it uses less digits than its factorization.

842228181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158937 (or 158934 counting only the distinct ones).

The product of its digits is 16384, while the sum is 36.

The square root of 842228181 is about 29021.1678090321. The cubic root of 842228181 is about 944.3723353629.

The spelling of 842228181 in words is "eight hundred forty-two million, two hundred twenty-eight thousand, one hundred eighty-one".