1165343311 has 8 divisors (see below), whose sum is σ = 1288699344. Its totient is φ = 1044889920.

The previous prime is 1165343303. The next prime is 1165343363. The reversal of 1165343311 is 1133435611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1165343311 - 2³ = 1165343303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1165343311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165343371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 724816 + ... + 726421.

It is an arithmetic number, because the mean of its divisors is an integer number (161087418).

Almost surely, 2^1165343311 is an apocalyptic number.

1165343311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1165343311 is a deficient number, since it is larger than the sum of its proper divisors (123356033).

1165343311 is a wasteful number, since it uses less digits than its factorization.

1165343311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451321.

The product of its digits is 3240, while the sum is 28.

The square root of 1165343311 is about 34137.1251132839. The cubic root of 1165343311 is about 1052.3284113841.

Adding to 1165343311 its reverse (1133435611), we get a palindrome (2298778922).

The spelling of 1165343311 in words is "one billion, one hundred sixty-five million, three hundred forty-three thousand, three hundred eleven".