12223751 has 2 divisors, whose sum is σ = 12223752. Its totient is φ = 12223750.

The previous prime is 12223721. The next prime is 12223753. The reversal of 12223751 is 15732221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12223751 is a prime.

Together with 12223753, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12223753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111875 + 6111876.

It is an arithmetic number, because the mean of its divisors is an integer number (6111876).

Almost surely, 2^12223751 is an apocalyptic number.

12223751 is a deficient number, since it is larger than the sum of its proper divisors (1).

12223751 is an equidigital number, since it uses as much as digits as its factorization.

12223751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 23.

The square root of 12223751 is about 3496.2481319266. The cubic root of 12223751 is about 230.3570446922.

Adding to 12223751 its reverse (15732221), we get a palindrome (27955972).

The spelling of 12223751 in words is "twelve million, two hundred twenty-three thousand, seven hundred fifty-one".