1224203243 has 4 divisors (see below), whose sum is σ = 1224311088. Its totient is φ = 1224095400.

The previous prime is 1224203209. The next prime is 1224203251. The reversal of 1224203243 is 3423024221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3423024221 = 20887 ⋅163883.

It is a cyclic number.

It is not a de Polignac number, because 1224203243 - 2⁶ = 1224203179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1224203293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34583 + ... + 60368.

It is an arithmetic number, because the mean of its divisors is an integer number (306077772).

Almost surely, 2^1224203243 is an apocalyptic number.

1224203243 is a deficient number, since it is larger than the sum of its proper divisors (107845).

1224203243 is an equidigital number, since it uses as much as digits as its factorization.

1224203243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107844.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 1224203243 is about 34988.6159057485. The cubic root of 1224203243 is about 1069.7554520176.

Adding to 1224203243 its reverse (3423024221), we get a palindrome (4647227464).

The spelling of 1224203243 in words is "one billion, two hundred twenty-four million, two hundred three thousand, two hundred forty-three".