2311323161 has 8 divisors (see below), whose sum is σ = 2673338304. Its totient is φ = 1957264560.

The previous prime is 2311323139. The next prime is 2311323173. The reversal of 2311323161 is 1613231132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2311323161 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2311323101) 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, 1988510 + ... + 1989671.

It is an arithmetic number, because the mean of its divisors is an integer number (334167288).

Almost surely, 2^2311323161 is an apocalyptic number.

It is an amenable number.

2311323161 is a deficient number, since it is larger than the sum of its proper divisors (362015143).

2311323161 is an equidigital number, since it uses as much as digits as its factorization.

2311323161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3978271.

The product of its digits is 648, while the sum is 23.

The square root of 2311323161 is about 48076.2224077558. Note that the first 3 decimals coincide. The cubic root of 2311323161 is about 1322.1687566799.

Adding to 2311323161 its reverse (1613231132), we get a palindrome (3924554293).

The spelling of 2311323161 in words is "two billion, three hundred eleven million, three hundred twenty-three thousand, one hundred sixty-one".