2221390 has 32 divisors (see below), whose sum is σ = 4315680. Its totient is φ = 820224.

The previous prime is 2221381. The next prime is 2221391. The reversal of 2221390 is 931222.

It is a happy number.

2221390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221391) 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, 12321 + ... + 12499.

It is an arithmetic number, because the mean of its divisors is an integer number (134865).

2^2221390 is an apocalyptic number.

2221390 is a deficient number, since it is larger than the sum of its proper divisors (2094290).

2221390 is a wasteful number, since it uses less digits than its factorization.

2221390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 2221390 is about 1490.4328230417. The cubic root of 2221390 is about 130.4792958057.

It can be divided in two parts, 22 and 21390, that added together give a palindrome (21412).

The spelling of 2221390 in words is "two million, two hundred twenty-one thousand, three hundred ninety".