1224313243 has 4 divisors (see below), whose sum is σ = 1252785688. Its totient is φ = 1195840800.

The previous prime is 1224313229. The next prime is 1224313273. The reversal of 1224313243 is 3423134221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1224313243 - 2⁹ = 1224312731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1224313273) 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, 14236158 + ... + 14236243.

It is an arithmetic number, because the mean of its divisors is an integer number (313196422).

Almost surely, 2^1224313243 is an apocalyptic number.

1224313243 is a deficient number, since it is larger than the sum of its proper divisors (28472445).

1224313243 is an equidigital number, since it uses as much as digits as its factorization.

1224313243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28472444.

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

The square root of 1224313243 is about 34990.1878102990. The cubic root of 1224313243 is about 1069.7874917888.

Adding to 1224313243 its reverse (3423134221), we get a palindrome (4647447464).

The spelling of 1224313243 in words is "one billion, two hundred twenty-four million, three hundred thirteen thousand, two hundred forty-three".