1232443213 has 4 divisors (see below), whose sum is σ = 1248043840. Its totient is φ = 1216842588.

The previous prime is 1232443187. The next prime is 1232443217. The reversal of 1232443213 is 3123442321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3123442321 = 4951 ⋅630871.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1232443213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232443217) 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 3 ways as a sum of consecutive naturals, for example, 7800195 + ... + 7800352.

It is an arithmetic number, because the mean of its divisors is an integer number (312010960).

Almost surely, 2^1232443213 is an apocalyptic number.

It is an amenable number.

1232443213 is a deficient number, since it is larger than the sum of its proper divisors (15600627).

1232443213 is an equidigital number, since it uses as much as digits as its factorization.

1232443213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15600626.

The product of its digits is 3456, while the sum is 25.

The square root of 1232443213 is about 35106.1705829616. The cubic root of 1232443213 is about 1072.1502203372.

Adding to 1232443213 its reverse (3123442321), we get a palindrome (4355885534).

The spelling of 1232443213 in words is "one billion, two hundred thirty-two million, four hundred forty-three thousand, two hundred thirteen".