1243222563 has 16 divisors (see below), whose sum is σ = 1914696576. Its totient is φ = 709146240.

The previous prime is 1243222549. The next prime is 1243222609. The reversal of 1243222563 is 3652223421.

It is not a de Polignac number, because 1243222563 - 2⁵ = 1243222531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1243222563.

It is not an unprimeable number, because it can be changed into a prime (1243221563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1107481 + ... + 1108602.

It is an arithmetic number, because the mean of its divisors is an integer number (119668536).

Almost surely, 2^1243222563 is an apocalyptic number.

1243222563 is a deficient number, since it is larger than the sum of its proper divisors (671474013).

1243222563 is a wasteful number, since it uses less digits than its factorization.

1243222563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216114.

The product of its digits is 17280, while the sum is 30.

The square root of 1243222563 is about 35259.3613526961. The cubic root of 1243222563 is about 1075.2669430458.

Adding to 1243222563 its reverse (3652223421), we get a palindrome (4895445984).

The spelling of 1243222563 in words is "one billion, two hundred forty-three million, two hundred twenty-two thousand, five hundred sixty-three".