12443551 has 2 divisors, whose sum is σ = 12443552. Its totient is φ = 12443550.

The previous prime is 12443539. The next prime is 12443591. The reversal of 12443551 is 15534421.

It is a happy number.

12443551 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12443551 - 2¹¹ = 12441503 is a prime.

It is a super-2 number, since 2×12443551² = 309683922979202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12443521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6221775 + 6221776.

It is an arithmetic number, because the mean of its divisors is an integer number (6221776).

Almost surely, 2^12443551 is an apocalyptic number.

12443551 is a deficient number, since it is larger than the sum of its proper divisors (1).

12443551 is an equidigital number, since it uses as much as digits as its factorization.

12443551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2400, while the sum is 25.

The square root of 12443551 is about 3527.5417786328. The cubic root of 12443551 is about 231.7295637466.

Adding to 12443551 its reverse (15534421), we get a palindrome (27977972).

The spelling of 12443551 in words is "twelve million, four hundred forty-three thousand, five hundred fifty-one".