1131445523 has 16 divisors (see below), whose sum is σ = 1317617280. Its totient is φ = 962052096.

The previous prime is 1131445493. The next prime is 1131445529. The reversal of 1131445523 is 3255441311.

It is a cyclic number.

It is not a de Polignac number, because 1131445523 - 2²⁶ = 1064336659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131445529) 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, 44078 + ... + 64851.

It is an arithmetic number, because the mean of its divisors is an integer number (82351080).

Almost surely, 2^1131445523 is an apocalyptic number.

1131445523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1131445523 is a deficient number, since it is larger than the sum of its proper divisors (186171757).

1131445523 is a wasteful number, since it uses less digits than its factorization.

1131445523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109006.

The product of its digits is 7200, while the sum is 29.

The square root of 1131445523 is about 33636.9666141286. The cubic root of 1131445523 is about 1042.0243862512.

Adding to 1131445523 its reverse (3255441311), we get a palindrome (4386886834).

The spelling of 1131445523 in words is "one billion, one hundred thirty-one million, four hundred forty-five thousand, five hundred twenty-three".