2217970 has 8 divisors (see below), whose sum is σ = 3992364. Its totient is φ = 887184.

The previous prime is 2217967. The next prime is 2217991. The reversal of 2217970 is 797122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1868689 + 349281 = 1367^2 + 591^2 .

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

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, 110889 + ... + 110908.

2^2217970 is an apocalyptic number.

2217970 is a deficient number, since it is larger than the sum of its proper divisors (1774394).

2217970 is a wasteful number, since it uses less digits than its factorization.

2217970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221804.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 2217970 is about 1489.2850633777. The cubic root of 2217970 is about 130.4123004569.

The spelling of 2217970 in words is "two million, two hundred seventeen thousand, nine hundred seventy".