23721223 has 2 divisors, whose sum is σ = 23721224. Its totient is φ = 23721222.

The previous prime is 23721221. The next prime is 23721233. The reversal of 23721223 is 32212732.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23721223 - 2¹ = 23721221 is a prime.

Together with 23721221, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 23721194 and 23721203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23721221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11860611 + 11860612.

It is an arithmetic number, because the mean of its divisors is an integer number (11860612).

Almost surely, 2^23721223 is an apocalyptic number.

23721223 is a deficient number, since it is larger than the sum of its proper divisors (1).

23721223 is an equidigital number, since it uses as much as digits as its factorization.

23721223 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 23721223 is about 4870.4438196123. The cubic root of 23721223 is about 287.3287115796.

Adding to 23721223 its reverse (32212732), we get a palindrome (55933955).

The spelling of 23721223 in words is "twenty-three million, seven hundred twenty-one thousand, two hundred twenty-three".