311439161 has 16 divisors (see below), whose sum is σ = 345706368. Its totient is φ = 278208000.

The previous prime is 311439137. The next prime is 311439181. The reversal of 311439161 is 161934113.

It is a cyclic number.

It is not a de Polignac number, because 311439161 - 2¹⁴ = 311422777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311439181) 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 15 ways as a sum of consecutive naturals, for example, 160151 + ... + 162083.

It is an arithmetic number, because the mean of its divisors is an integer number (21606648).

Almost surely, 2^311439161 is an apocalyptic number.

It is an amenable number.

311439161 is a deficient number, since it is larger than the sum of its proper divisors (34267207).

311439161 is a wasteful number, since it uses less digits than its factorization.

311439161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2192.

The product of its digits is 1944, while the sum is 29.

The square root of 311439161 is about 17647.6389638954. The cubic root of 311439161 is about 677.8356509144.

It can be divided in two parts, 31143 and 9161, that added together give a palindrome (40304).

The spelling of 311439161 in words is "three hundred eleven million, four hundred thirty-nine thousand, one hundred sixty-one".