2187222 has 8 divisors (see below), whose sum is σ = 4374456. Its totient is φ = 729072.

The previous prime is 2187217. The next prime is 2187233. The reversal of 2187222 is 2227812.

It is a happy number.

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

2187222 is an admirable number.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2187192 and 2187201.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 182263 + ... + 182274.

It is an arithmetic number, because the mean of its divisors is an integer number (546807).

2^2187222 is an apocalyptic number.

2187222 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.

2187222 is a wasteful number, since it uses less digits than its factorization.

2187222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364542.

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

The square root of 2187222 is about 1478.9259616357. The cubic root of 2187222 is about 129.8068532148.

It can be divided in two parts, 21872 and 22, that multiplied together give a palindrome (481184).

The spelling of 2187222 in words is "two million, one hundred eighty-seven thousand, two hundred twenty-two".