1223543530 has 48 divisors (see below), whose sum is σ = 2443268520. Its totient is φ = 440795520.

The previous prime is 1223543507. The next prime is 1223543539. The reversal of 1223543530 is 353453221.

It can be written as a sum of positive squares in 4 ways, for example, as 1180128609 + 43414921 = 34353^2 + 6589^2 .

It is not an unprimeable number, because it can be changed into a prime (1223543539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127252 + ... + 136528.

Almost surely, 2^1223543530 is an apocalyptic number.

1223543530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1223543530 is a deficient number, since it is larger than the sum of its proper divisors (1219724990).

1223543530 is a wasteful number, since it uses less digits than its factorization.

1223543530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9415 (or 9404 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 1223543530 is about 34979.1870974727. The cubic root of 1223543530 is about 1069.5632567015.

Adding to 1223543530 its reverse (353453221), we get a palindrome (1576996751).

The spelling of 1223543530 in words is "one billion, two hundred twenty-three million, five hundred forty-three thousand, five hundred thirty".