2216465 has 4 divisors (see below), whose sum is σ = 2659764. Its totient is φ = 1773168.

The previous prime is 2216437. The next prime is 2216471. The reversal of 2216465 is 5646122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 588289 + 1628176 = 767^2 + 1276^2 .

It is a cyclic number.

It is not a de Polignac number, because 2216465 - 2²⁰ = 1167889 is a prime.

It is a Duffinian 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, 221642 + ... + 221651.

It is an arithmetic number, because the mean of its divisors is an integer number (664941).

2^2216465 is an apocalyptic number.

It is an amenable number.

2216465 is a deficient number, since it is larger than the sum of its proper divisors (443299).

2216465 is an equidigital number, since it uses as much as digits as its factorization.

2216465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443298.

The product of its digits is 2880, while the sum is 26.

The square root of 2216465 is about 1488.7797016349. The cubic root of 2216465 is about 130.3827967632.

The spelling of 2216465 in words is "two million, two hundred sixteen thousand, four hundred sixty-five".