1156221232 has 20 divisors (see below), whose sum is σ = 2240706040. Its totient is φ = 577974528.

The previous prime is 1156221203. The next prime is 1156221239. The reversal of 1156221232 is 2321226511.

It is a junction number, because it is equal to n+sod(n) for n = 1156221197 and 1156221206.

It is not an unprimeable number, because it can be changed into a prime (1156221239) 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, 126943 + ... + 135745.

It is an arithmetic number, because the mean of its divisors is an integer number (112035302).

Almost surely, 2^1156221232 is an apocalyptic number.

It is an amenable number.

1156221232 is a deficient number, since it is larger than the sum of its proper divisors (1084484808).

1156221232 is an equidigital number, since it uses as much as digits as its factorization.

1156221232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17020 (or 17014 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 1156221232 is about 34003.2532561224. The cubic root of 1156221232 is about 1049.5754086777.

Adding to 1156221232 its reverse (2321226511), we get a palindrome (3477447743).

The spelling of 1156221232 in words is "one billion, one hundred fifty-six million, two hundred twenty-one thousand, two hundred thirty-two".