2216458 has 4 divisors (see below), whose sum is σ = 3324690. Its totient is φ = 1108228.

The previous prime is 2216437. The next prime is 2216471. The reversal of 2216458 is 8546122.

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., 1776889 + 439569 = 1333^2 + 663^2 .

It is a d-powerful number, because it can be written as 2¹⁰ + 2¹⁸ + 1 + 6² + 4³ + 5⁹ + 8² .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554113 + ... + 554116.

2^2216458 is an apocalyptic number.

2216458 is a deficient number, since it is larger than the sum of its proper divisors (1108232).

2216458 is a wasteful number, since it uses less digits than its factorization.

2216458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108231.

The product of its digits is 3840, while the sum is 28.

The square root of 2216458 is about 1488.7773507143. Note that the first 3 decimals coincide. The cubic root of 2216458 is about 130.3826595056.

It can be divided in two parts, 22164 and 58, that added together give a palindrome (22222).

The spelling of 2216458 in words is "two million, two hundred sixteen thousand, four hundred fifty-eight".