1165311255 has 16 divisors (see below), whose sum is σ = 1865060064. Its totient is φ = 621312000.

The previous prime is 1165311247. The next prime is 1165311281. The reversal of 1165311255 is 5521135611.

It is not a de Polignac number, because 1165311255 - 2³ = 1165311247 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 50307 + ... + 69723.

It is an arithmetic number, because the mean of its divisors is an integer number (116566254).

Almost surely, 2^1165311255 is an apocalyptic number.

1165311255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1165311255 is a deficient number, since it is larger than the sum of its proper divisors (699748809).

1165311255 is a wasteful number, since it uses less digits than its factorization.

1165311255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23426.

The product of its digits is 4500, while the sum is 30.

The square root of 1165311255 is about 34136.6555919000. The cubic root of 1165311255 is about 1052.3187622250.

Adding to 1165311255 its reverse (5521135611), we get a palindrome (6686446866).

The spelling of 1165311255 in words is "one billion, one hundred sixty-five million, three hundred eleven thousand, two hundred fifty-five".