422181138 has 32 divisors (see below), whose sum is σ = 872441856. Its totient is φ = 136111248.

The previous prime is 422181127. The next prime is 422181139. The reversal of 422181138 is 831181224.

It is not an unprimeable number, because it can be changed into a prime (422181139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18631 + ... + 34517.

It is an arithmetic number, because the mean of its divisors is an integer number (27263808).

Almost surely, 2^422181138 is an apocalyptic number.

422181138 is an abundant number, since it is smaller than the sum of its proper divisors (450260718).

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

422181138 is a wasteful number, since it uses less digits than its factorization.

422181138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16038.

The product of its digits is 3072, while the sum is 30.

The square root of 422181138 is about 20547.0469411057. The cubic root of 422181138 is about 750.1813712469.

It can be divided in two parts, 42218 and 1138, that multiplied together give a palindrome (48044084).

The spelling of 422181138 in words is "four hundred twenty-two million, one hundred eighty-one thousand, one hundred thirty-eight".