1151231133 has 32 divisors (see below), whose sum is σ = 1686327552. Its totient is φ = 694310400.

The previous prime is 1151231129. The next prime is 1151231149. The reversal of 1151231133 is 3311321511.

It is not a de Polignac number, because 1151231133 - 2² = 1151231129 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151231153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 500041 + ... + 502337.

It is an arithmetic number, because the mean of its divisors is an integer number (52697736).

Almost surely, 2^1151231133 is an apocalyptic number.

1151231133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1151231133 is a deficient number, since it is larger than the sum of its proper divisors (535096419).

1151231133 is a wasteful number, since it uses less digits than its factorization.

1151231133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2565.

The product of its digits is 270, while the sum is 21.

The square root of 1151231133 is about 33929.7971258303. The cubic root of 1151231133 is about 1048.0632880049.

Adding to 1151231133 its reverse (3311321511), we get a palindrome (4462552644).

The spelling of 1151231133 in words is "one billion, one hundred fifty-one million, two hundred thirty-one thousand, one hundred thirty-three".