12231547 has 2 divisors, whose sum is σ = 12231548. Its totient is φ = 12231546.

The previous prime is 12231539. The next prime is 12231563. The reversal of 12231547 is 74513221.

It is a happy number.

12231547 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 an emirp because it is prime and its reverse (74513221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12231547 - 2³ = 12231539 is a prime.

It is a super-2 number, since 2×12231547² = 299221484026418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12231647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6115773 + 6115774.

It is an arithmetic number, because the mean of its divisors is an integer number (6115774).

Almost surely, 2^12231547 is an apocalyptic number.

12231547 is a deficient number, since it is larger than the sum of its proper divisors (1).

12231547 is an equidigital number, since it uses as much as digits as its factorization.

12231547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 25.

The square root of 12231547 is about 3497.3628636445. The cubic root of 12231547 is about 230.4060062554.

Adding to 12231547 its reverse (74513221), we get a palindrome (86744768).

It can be divided in two parts, 1223 and 1547, that multiplied together give a palindrome (1891981).

The spelling of 12231547 in words is "twelve million, two hundred thirty-one thousand, five hundred forty-seven".