2216455 has 4 divisors (see below), whose sum is σ = 2659752. Its totient is φ = 1773160.

The previous prime is 2216437. The next prime is 2216471. The reversal of 2216455 is 5546122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5546122 = 2 ⋅2773061.

It is not a de Polignac number, because 2216455 - 2⁹ = 2215943 is a prime.

It is a d-powerful number, because it can be written as 2¹⁷ + 2¹⁷ + 1 + 6² + 4⁵ + 5³ + 5⁹ .

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221641 + ... + 221650.

It is an arithmetic number, because the mean of its divisors is an integer number (664938).

2^2216455 is an apocalyptic number.

2216455 is a deficient number, since it is larger than the sum of its proper divisors (443297).

2216455 is an equidigital number, since it uses as much as digits as its factorization.

2216455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443296.

The product of its digits is 2400, while the sum is 25.

The square root of 2216455 is about 1488.7763431758. The cubic root of 2216455 is about 130.3826006808.

The spelling of 2216455 in words is "two million, two hundred sixteen thousand, four hundred fifty-five".