2216869 has 4 divisors (see below), whose sum is σ = 2238496. Its totient is φ = 2195244.

The previous prime is 2216861. The next prime is 2216873. The reversal of 2216869 is 9686122.

It is a happy number.

2216869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9686122 = 2 ⋅4843061.

It is a cyclic number.

It is not a de Polignac number, because 2216869 - 2³ = 2216861 is a prime.

It is a super-2 number, since 2×2216869² = 9829016326322, which contains 22 as substring.

It is a Duffinian number.

2216869 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10659 + ... + 10864.

It is an arithmetic number, because the mean of its divisors is an integer number (559624).

2^2216869 is an apocalyptic number.

It is an amenable number.

2216869 is a deficient number, since it is larger than the sum of its proper divisors (21627).

2216869 is a wasteful number, since it uses less digits than its factorization.

2216869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21626.

The product of its digits is 10368, while the sum is 34.

The square root of 2216869 is about 1488.9153770446. The cubic root of 2216869 is about 130.3907180027.

The spelling of 2216869 in words is "two million, two hundred sixteen thousand, eight hundred sixty-nine".