1153221232 has 20 divisors (see below), whose sum is σ = 2256491736. Its totient is φ = 570900800.

The previous prime is 1153221229. The next prime is 1153221233. The reversal of 1153221232 is 2321223511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153221233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355198 + ... + 358429.

Almost surely, 2^1153221232 is an apocalyptic number.

It is an amenable number.

1153221232 is a deficient number, since it is larger than the sum of its proper divisors (1103270504).

1153221232 is a wasteful number, since it uses less digits than its factorization.

1153221232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713736 (or 713730 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 1153221232 is about 33959.1111780035. Note that the first 4 decimals coincide. The cubic root of 1153221232 is about 1048.6668589522. Note that the first 3 decimals are identical.

Adding to 1153221232 its reverse (2321223511), we get a palindrome (3474444743).

The spelling of 1153221232 in words is "one billion, one hundred fifty-three million, two hundred twenty-one thousand, two hundred thirty-two".