1131133523 has 4 divisors (see below), whose sum is σ = 1218143808. Its totient is φ = 1044123240.

The previous prime is 1131133481. The next prime is 1131133547. The reversal of 1131133523 is 3253311311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1131133523 - 2²⁰ = 1130084947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131133723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43505123 + ... + 43505148.

It is an arithmetic number, because the mean of its divisors is an integer number (304535952).

Almost surely, 2^1131133523 is an apocalyptic number.

1131133523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1131133523 is a deficient number, since it is larger than the sum of its proper divisors (87010285).

1131133523 is an equidigital number, since it uses as much as digits as its factorization.

1131133523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87010284.

The product of its digits is 810, while the sum is 23.

The square root of 1131133523 is about 33632.3285396655. The cubic root of 1131133523 is about 1041.9285968414.

Adding to 1131133523 its reverse (3253311311), we get a palindrome (4384444834).

The spelling of 1131133523 in words is "one billion, one hundred thirty-one million, one hundred thirty-three thousand, five hundred twenty-three".