1153533321 has 6 divisors (see below), whose sum is σ = 1666214810. Its totient is φ = 769022208.

The previous prime is 1153533307. The next prime is 1153533341. The reversal of 1153533321 is 1233353511.

It can be written as a sum of positive squares in only one way, i.e., 955737225 + 197796096 = 30915^2 + 14064^2 .

It is not a de Polignac number, because 1153533321 - 2⁶ = 1153533257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1153533341) 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 5 ways as a sum of consecutive naturals, for example, 64085176 + ... + 64085193.

Almost surely, 2^1153533321 is an apocalyptic number.

It is an amenable number.

1153533321 is a deficient number, since it is larger than the sum of its proper divisors (512681489).

1153533321 is a wasteful number, since it uses less digits than its factorization.

1153533321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128170375 (or 128170372 counting only the distinct ones).

The product of its digits is 4050, while the sum is 27.

The square root of 1153533321 is about 33963.7059373679. The cubic root of 1153533321 is about 1048.7614484561.

Adding to 1153533321 its reverse (1233353511), we get a palindrome (2386886832).

The spelling of 1153533321 in words is "one billion, one hundred fifty-three million, five hundred thirty-three thousand, three hundred twenty-one".