2216290 has 16 divisors (see below), whose sum is σ = 4224312. Its totient is φ = 834304.

The previous prime is 2216287. The next prime is 2216299. The reversal of 2216290 is 926122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2105401 + 110889 = 1451^2 + 333^2 .

It is not an unprimeable number, because it can be changed into a prime (2216299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6349 + ... + 6688.

2^2216290 is an apocalyptic number.

2216290 is a deficient number, since it is larger than the sum of its proper divisors (2008022).

2216290 is a wasteful number, since it uses less digits than its factorization.

2216290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13061.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 2216290 is about 1488.7209275079. The cubic root of 2216290 is about 130.3793652345.

The spelling of 2216290 in words is "two million, two hundred sixteen thousand, two hundred ninety".