1155240311 has 8 divisors (see below), whose sum is σ = 1177554240. Its totient is φ = 1132945632.

The previous prime is 1155240271. The next prime is 1155240341. The reversal of 1155240311 is 1130425511.

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 1155240311 - 2²² = 1151046007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155240341) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 194930 + ... + 200768.

It is an arithmetic number, because the mean of its divisors is an integer number (147194280).

Almost surely, 2^1155240311 is an apocalyptic number.

1155240311 is a deficient number, since it is larger than the sum of its proper divisors (22313929).

1155240311 is an equidigital number, since it uses as much as digits as its factorization.

1155240311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9625.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1155240311 is about 33988.8262668778. The cubic root of 1155240311 is about 1049.2785099470.

Adding to 1155240311 its reverse (1130425511), we get a palindrome (2285665822).

The spelling of 1155240311 in words is "one billion, one hundred fifty-five million, two hundred forty thousand, three hundred eleven".