1131343523 has 4 divisors (see below), whose sum is σ = 1197893160. Its totient is φ = 1064793888.

The previous prime is 1131343513. The next prime is 1131343531. The reversal of 1131343523 is 3253431311.

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 1131343523 - 2²⁶ = 1064234659 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131343492 and 1131343501.

It is not an unprimeable number, because it can be changed into a prime (1131343513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33274793 + ... + 33274826.

It is an arithmetic number, because the mean of its divisors is an integer number (299473290).

Almost surely, 2^1131343523 is an apocalyptic number.

1131343523 is a deficient number, since it is larger than the sum of its proper divisors (66549637).

1131343523 is an equidigital number, since it uses as much as digits as its factorization.

1131343523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66549636.

The product of its digits is 3240, while the sum is 26.

The square root of 1131343523 is about 33635.4503909194. The cubic root of 1131343523 is about 1041.9930724203.

Adding to 1131343523 its reverse (3253431311), we get a palindrome (4384774834).

The spelling of 1131343523 in words is "one billion, one hundred thirty-one million, three hundred forty-three thousand, five hundred twenty-three".