2181407822 has 32 divisors (see below), whose sum is σ = 3790782720. Its totient is φ = 931029120.

The previous prime is 2181407821. The next prime is 2181407857. The reversal of 2181407822 is 2287041812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181407821) 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 15 ways as a sum of consecutive naturals, for example, 24143 + ... + 70325.

It is an arithmetic number, because the mean of its divisors is an integer number (118461960).

Almost surely, 2^2181407822 is an apocalyptic number.

2181407822 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2181407822 is a deficient number, since it is larger than the sum of its proper divisors (1609374898).

2181407822 is a wasteful number, since it uses less digits than its factorization.

2181407822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46328.

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 2181407822 is about 46705.5438037071. The cubic root of 2181407822 is about 1296.9173155454.

The spelling of 2181407822 in words is "two billion, one hundred eighty-one million, four hundred seven thousand, eight hundred twenty-two".