2221723 has 8 divisors (see below), whose sum is σ = 2548448. Its totient is φ = 1897344.

The previous prime is 2221721. The next prime is 2221733. The reversal of 2221723 is 3271222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2221723 - 2¹ = 2221721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2221723.

It is not an unprimeable number, because it can be changed into a prime (2221721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2665 + ... + 3397.

It is an arithmetic number, because the mean of its divisors is an integer number (318556).

2^2221723 is an apocalyptic number.

2221723 is a deficient number, since it is larger than the sum of its proper divisors (326725).

2221723 is an equidigital number, since it uses as much as digits as its factorization.

2221723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173.

The product of its digits is 336, while the sum is 19.

The square root of 2221723 is about 1490.5445313710. The cubic root of 2221723 is about 130.4858153625.

Adding to 2221723 its reverse (3271222), we get a palindrome (5492945).

The spelling of 2221723 in words is "two million, two hundred twenty-one thousand, seven hundred twenty-three".