1131144165 has 48 divisors (see below), whose sum is σ = 2016705600. Its totient is φ = 586265856.

The previous prime is 1131144067. The next prime is 1131144173. The reversal of 1131144165 is 5614411311.

It is not a de Polignac number, because 1131144165 - 2⁷ = 1131144037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 233902 + ... + 238688.

It is an arithmetic number, because the mean of its divisors is an integer number (42014700).

Almost surely, 2^1131144165 is an apocalyptic number.

1131144165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1131144165 is a deficient number, since it is larger than the sum of its proper divisors (885561435).

1131144165 is a wasteful number, since it uses less digits than its factorization.

1131144165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4946 (or 4943 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 1131144165 is about 33632.4867501646. The cubic root of 1131144165 is about 1041.9318644101.

Adding to 1131144165 its reverse (5614411311), we get a palindrome (6745555476).

The spelling of 1131144165 in words is "one billion, one hundred thirty-one million, one hundred forty-four thousand, one hundred sixty-five".