311244545161 has 4 divisors (see below), whose sum is σ = 339539503824. Its totient is φ = 282949586500.

The previous prime is 311244545149. The next prime is 311244545177. The reversal of 311244545161 is 161545442113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 311244545161 - 2⁹ = 311244544649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 311244545161.

It is not an unprimeable number, because it can be changed into a prime (311244545761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14147479315 + ... + 14147479336.

It is an arithmetic number, because the mean of its divisors is an integer number (84884875956).

Almost surely, 2^311244545161 is an apocalyptic number.

It is an amenable number.

311244545161 is a deficient number, since it is larger than the sum of its proper divisors (28294958663).

311244545161 is a wasteful number, since it uses less digits than its factorization.

311244545161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28294958662.

The product of its digits is 57600, while the sum is 37.

Adding to 311244545161 its reverse (161545442113), we get a palindrome (472789987274).

The spelling of 311244545161 in words is "three hundred eleven billion, two hundred forty-four million, five hundred forty-five thousand, one hundred sixty-one".