2178222 has 8 divisors (see below), whose sum is σ = 4356456. Its totient is φ = 726072.

The previous prime is 2178203. The next prime is 2178223. The reversal of 2178222 is 2228712.

It is a happy number.

2178222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

2178222 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 2178192 and 2178201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2178223) 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 3 ways as a sum of consecutive naturals, for example, 181513 + ... + 181524.

It is an arithmetic number, because the mean of its divisors is an integer number (544557).

2^2178222 is an apocalyptic number.

2178222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2178222 is a wasteful number, since it uses less digits than its factorization.

2178222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363042.

The product of its digits is 896, while the sum is 24.

The square root of 2178222 is about 1475.8800764290. The cubic root of 2178222 is about 129.6285649960.

The spelling of 2178222 in words is "two million, one hundred seventy-eight thousand, two hundred twenty-two".