1163221243 has 12 divisors (see below), whose sum is σ = 1237779792. Its totient is φ = 1092928640.

The previous prime is 1163221231. The next prime is 1163221247. The reversal of 1163221243 is 3421223611.

It is not a de Polignac number, because 1163221243 - 2⁹ = 1163220731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1163221247) 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 11 ways as a sum of consecutive naturals, for example, 183873 + ... + 190093.

It is an arithmetic number, because the mean of its divisors is an integer number (103148316).

Almost surely, 2^1163221243 is an apocalyptic number.

1163221243 is a deficient number, since it is larger than the sum of its proper divisors (74558549).

1163221243 is an equidigital number, since it uses as much as digits as its factorization.

1163221243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6902 (or 6885 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 1163221243 is about 34106.0294229627. The cubic root of 1163221243 is about 1051.6892665975.

Adding to 1163221243 its reverse (3421223611), we get a palindrome (4584444854).

The spelling of 1163221243 in words is "one billion, one hundred sixty-three million, two hundred twenty-one thousand, two hundred forty-three".