2216138 has 4 divisors (see below), whose sum is σ = 3324210. Its totient is φ = 1108068.

The previous prime is 2216117. The next prime is 2216143. The reversal of 2216138 is 8316122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1471369 + 744769 = 1213^2 + 863^2 .

It is a super-2 number, since 2×2216138² = 9822535270088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554033 + ... + 554036.

2^2216138 is an apocalyptic number.

2216138 is a deficient number, since it is larger than the sum of its proper divisors (1108072).

2216138 is a wasteful number, since it uses less digits than its factorization.

2216138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108071.

The product of its digits is 576, while the sum is 23.

The square root of 2216138 is about 1488.6698760975. The cubic root of 2216138 is about 130.3763845601.

The spelling of 2216138 in words is "two million, two hundred sixteen thousand, one hundred thirty-eight".