2171223 has 24 divisors (see below), whose sum is σ = 3470688. Its totient is φ = 1300992.

The previous prime is 2171219. The next prime is 2171231. The reversal of 2171223 is 3221712.

It is not a de Polignac number, because 2171223 - 2² = 2171219 is a prime.

2171223 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2171196 and 2171205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3211 + ... + 3827.

It is an arithmetic number, because the mean of its divisors is an integer number (144612).

2^2171223 is an apocalyptic number.

2171223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2171223 is a deficient number, since it is larger than the sum of its proper divisors (1299465).

2171223 is a wasteful number, since it uses less digits than its factorization.

2171223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663 (or 660 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 2171223 is about 1473.5070410419. The cubic root of 2171223 is about 129.4895764382.

Adding to 2171223 its reverse (3221712), we get a palindrome (5392935).

The spelling of 2171223 in words is "two million, one hundred seventy-one thousand, two hundred twenty-three".