1155788227 has 4 divisors (see below), whose sum is σ = 1260859896. Its totient is φ = 1050716560.

The previous prime is 1155788191. The next prime is 1155788239. The reversal of 1155788227 is 7228875511.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155788227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155788267) 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, 52535818 + ... + 52535839.

It is an arithmetic number, because the mean of its divisors is an integer number (315214974).

Almost surely, 2^1155788227 is an apocalyptic number.

1155788227 is a deficient number, since it is larger than the sum of its proper divisors (105071669).

1155788227 is a wasteful number, since it uses less digits than its factorization.

1155788227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105071668.

The product of its digits is 313600, while the sum is 46.

The square root of 1155788227 is about 33996.8855485322. The cubic root of 1155788227 is about 1049.4443702766. Note that the first 3 decimals are identical.

The spelling of 1155788227 in words is "one billion, one hundred fifty-five million, seven hundred eighty-eight thousand, two hundred twenty-seven".