2311323155 has 4 divisors (see below), whose sum is σ = 2773587792. Its totient is φ = 1849058520.

The previous prime is 2311323139. The next prime is 2311323173. The reversal of 2311323155 is 5513231132.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2311323155 - 2⁴ = 2311323139 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 231132311 + ... + 231132320.

It is an arithmetic number, because the mean of its divisors is an integer number (693396948).

Almost surely, 2^2311323155 is an apocalyptic number.

2311323155 is a deficient number, since it is larger than the sum of its proper divisors (462264637).

2311323155 is an equidigital number, since it uses as much as digits as its factorization.

2311323155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462264636.

The product of its digits is 2700, while the sum is 26.

The square root of 2311323155 is about 48076.2223453549. Note that the first 3 decimals coincide. The cubic root of 2311323155 is about 1322.1687555358.

Adding to 2311323155 its reverse (5513231132), we get a palindrome (7824554287).

The spelling of 2311323155 in words is "two billion, three hundred eleven million, three hundred twenty-three thousand, one hundred fifty-five".