12243551 has 2 divisors, whose sum is σ = 12243552. Its totient is φ = 12243550.

The previous prime is 12243541. The next prime is 12243557. The reversal of 12243551 is 15534221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12243551 - 2¹⁴ = 12227167 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12243557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6121775 + 6121776.

It is an arithmetic number, because the mean of its divisors is an integer number (6121776).

Almost surely, 2^12243551 is an apocalyptic number.

12243551 is a deficient number, since it is larger than the sum of its proper divisors (1).

12243551 is an equidigital number, since it uses as much as digits as its factorization.

12243551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 23.

The square root of 12243551 is about 3499.0785930013. The cubic root of 12243551 is about 230.4813548441.

Adding to 12243551 its reverse (15534221), we get a palindrome (27777772).

The spelling of 12243551 in words is "twelve million, two hundred forty-three thousand, five hundred fifty-one".