311242213545 has 32 divisors (see below), whose sum is σ = 512838604800. Its totient is φ = 161116722624.

The previous prime is 311242213543. The next prime is 311242213549. The reversal of 311242213545 is 545312242113.

It is not a de Polignac number, because 311242213545 - 2¹ = 311242213543 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (311242213543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2155947 + ... + 2295776.

It is an arithmetic number, because the mean of its divisors is an integer number (16026206400).

Almost surely, 2^311242213545 is an apocalyptic number.

It is an amenable number.

311242213545 is a deficient number, since it is larger than the sum of its proper divisors (201596391255).

311242213545 is a wasteful number, since it uses less digits than its factorization.

311242213545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4451869.

The product of its digits is 28800, while the sum is 33.

Adding to 311242213545 its reverse (545312242113), we get a palindrome (856554455658).

The spelling of 311242213545 in words is "three hundred eleven billion, two hundred forty-two million, two hundred thirteen thousand, five hundred forty-five".