1155233321 has 16 divisors (see below), whose sum is σ = 1302540288. Its totient is φ = 1015059600.

The previous prime is 1155233293. The next prime is 1155233327. The reversal of 1155233321 is 1233325511.

It is a cyclic number.

It is not a de Polignac number, because 1155233321 - 2²² = 1151039017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155233327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360890 + ... + 364076.

It is an arithmetic number, because the mean of its divisors is an integer number (81408768).

Almost surely, 2^1155233321 is an apocalyptic number.

1155233321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1155233321 is a deficient number, since it is larger than the sum of its proper divisors (147306967).

1155233321 is a wasteful number, since it uses less digits than its factorization.

1155233321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4292.

The product of its digits is 2700, while the sum is 26.

The square root of 1155233321 is about 33988.7234388113. The cubic root of 1155233321 is about 1049.2763936567.

Adding to 1155233321 its reverse (1233325511), we get a palindrome (2388558832).

The spelling of 1155233321 in words is "one billion, one hundred fifty-five million, two hundred thirty-three thousand, three hundred twenty-one".