2311161043 has 4 divisors (see below), whose sum is σ = 2311435720. Its totient is φ = 2310886368.

The previous prime is 2311161019. The next prime is 2311161077. The reversal of 2311161043 is 3401611132.

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

It is a cyclic number.

It is not a de Polignac number, because 2311161043 - 2¹⁷ = 2311029971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2311161143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124305 + ... + 141682.

It is an arithmetic number, because the mean of its divisors is an integer number (577858930).

Almost surely, 2^2311161043 is an apocalyptic number.

2311161043 is a deficient number, since it is larger than the sum of its proper divisors (274677).

2311161043 is an equidigital number, since it uses as much as digits as its factorization.

2311161043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274676.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 2311161043 is about 48074.5363264171. The cubic root of 2311161043 is about 1322.1378433096.

Adding to 2311161043 its reverse (3401611132), we get a palindrome (5712772175).

The spelling of 2311161043 in words is "two billion, three hundred eleven million, one hundred sixty-one thousand, forty-three".