22231723 has 2 divisors, whose sum is σ = 22231724. Its totient is φ = 22231722.

The previous prime is 22231673. The next prime is 22231757. The reversal of 22231723 is 32713222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22231723 - 2¹⁷ = 22100651 is a prime.

It is equal to p_1402852 and since 22231723 and 1402852 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 22231694 and 22231703.

It is not a weakly prime, because it can be changed into another prime (22231763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11115861 + 11115862.

It is an arithmetic number, because the mean of its divisors is an integer number (11115862).

Almost surely, 2^22231723 is an apocalyptic number.

22231723 is a deficient number, since it is larger than the sum of its proper divisors (1).

22231723 is an equidigital number, since it uses as much as digits as its factorization.

22231723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 22.

The square root of 22231723 is about 4715.0528098845. The cubic root of 22231723 is about 281.1842823903.

Adding to 22231723 its reverse (32713222), we get a palindrome (54944945).

The spelling of 22231723 in words is "twenty-two million, two hundred thirty-one thousand, seven hundred twenty-three".