2216641 has 4 divisors (see below), whose sum is σ = 2533312. Its totient is φ = 1899972.

The previous prime is 2216629. The next prime is 2216653. The reversal of 2216641 is 1466122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2216629) and next prime (2216653).

It is a cyclic number.

It is not a de Polignac number, because 2216641 - 2⁵ = 2216609 is a prime.

It is a Duffinian number.

2216641 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2216611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158325 + ... + 158338.

It is an arithmetic number, because the mean of its divisors is an integer number (633328).

2^2216641 is an apocalyptic number.

It is an amenable number.

2216641 is a deficient number, since it is larger than the sum of its proper divisors (316671).

2216641 is an equidigital number, since it uses as much as digits as its factorization.

2216641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316670.

The product of its digits is 576, while the sum is 22.

The square root of 2216641 is about 1488.8388092739. The cubic root of 2216641 is about 130.3862477185.

The spelling of 2216641 in words is "two million, two hundred sixteen thousand, six hundred forty-one".