1131223233 has 16 divisors (see below), whose sum is σ = 1724349440. Its totient is φ = 646195536.

The previous prime is 1131223217. The next prime is 1131223241. The reversal of 1131223233 is 3323221311.

It is not a de Polignac number, because 1131223233 - 2⁴ = 1131223217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131223253) 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 15 ways as a sum of consecutive naturals, for example, 71316 + ... + 85722.

It is an arithmetic number, because the mean of its divisors is an integer number (107771840).

Almost surely, 2^1131223233 is an apocalyptic number.

It is an amenable number.

1131223233 is a deficient number, since it is larger than the sum of its proper divisors (593126207).

1131223233 is a wasteful number, since it uses less digits than its factorization.

1131223233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18156.

The product of its digits is 648, while the sum is 21.

The square root of 1131223233 is about 33633.6622002422. The cubic root of 1131223233 is about 1041.9561411709.

Adding to 1131223233 its reverse (3323221311), we get a palindrome (4454444544).

The spelling of 1131223233 in words is "one billion, one hundred thirty-one million, two hundred twenty-three thousand, two hundred thirty-three".