2221670 has 32 divisors (see below), whose sum is σ = 4596480. Its totient is φ = 764640.

The previous prime is 2221669. The next prime is 2221673. The reversal of 2221670 is 761222.

2221670 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 (2221673) 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, 1559 + ... + 2621.

It is an arithmetic number, because the mean of its divisors is an integer number (143640).

2^2221670 is an apocalyptic number.

2221670 is an abundant number, since it is smaller than the sum of its proper divisors (2374810).

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

2221670 is a wasteful number, since it uses less digits than its factorization.

2221670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 2221670 is about 1490.5267525274. The cubic root of 2221670 is about 130.4847777589.

Adding to 2221670 its reverse (761222), we get a palindrome (2982892).

The spelling of 2221670 in words is "two million, two hundred twenty-one thousand, six hundred seventy".