2216923 has 4 divisors (see below), whose sum is σ = 2253328. Its totient is φ = 2180520.

The previous prime is 2216917. The next prime is 2216941. The reversal of 2216923 is 3296122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2216923 - 2²¹ = 119771 is a prime.

It is a d-powerful number, because it can be written as 2⁴ + 2¹⁰ + 1 + 6⁸ + 9³ + 2¹² + 3¹² .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2216323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18111 + ... + 18232.

It is an arithmetic number, because the mean of its divisors is an integer number (563332).

2^2216923 is an apocalyptic number.

2216923 is a deficient number, since it is larger than the sum of its proper divisors (36405).

2216923 is an equidigital number, since it uses as much as digits as its factorization.

2216923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36404.

The product of its digits is 1296, while the sum is 25.

The square root of 2216923 is about 1488.9335109400. The cubic root of 2216923 is about 130.3917767093.

It can be divided in two parts, 2 and 216923, that multiplied together give a triangular number (433846 = T₉₃₁).

The spelling of 2216923 in words is "two million, two hundred sixteen thousand, nine hundred twenty-three".