12226381 has 2 divisors, whose sum is σ = 12226382. Its totient is φ = 12226380.

The previous prime is 12226351. The next prime is 12226387. The reversal of 12226381 is 18362221.

12226381 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10949481 + 1276900 = 3309^2 + 1130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12226381 is a prime.

It is a super-2 number, since 2×12226381² = 298968784714322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12226387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6113190 + 6113191.

It is an arithmetic number, because the mean of its divisors is an integer number (6113191).

Almost surely, 2^12226381 is an apocalyptic number.

It is an amenable number.

12226381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12226381 is an equidigital number, since it uses as much as digits as its factorization.

12226381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 25.

The square root of 12226381 is about 3496.6242291673. The cubic root of 12226381 is about 230.3735643236.

The spelling of 12226381 in words is "twelve million, two hundred twenty-six thousand, three hundred eighty-one".