311230304212155 has 16 divisors (see below), whose sum is σ = 497989323686400. Its totient is φ = 165982549930848.

The previous prime is 311230304212147. The next prime is 311230304212207. The reversal of 311230304212155 is 551212403032113.

It is a happy number.

It is not a de Polignac number, because 311230304212155 - 2³ = 311230304212147 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 433732627 + ... + 434449596.

It is an arithmetic number, because the mean of its divisors is an integer number (31124332730400).

Almost surely, 2^{311230304212155} is an apocalyptic number.

311230304212155 is a deficient number, since it is larger than the sum of its proper divisors (186759019474245).

311230304212155 is a wasteful number, since it uses less digits than its factorization.

311230304212155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868206130.

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 311230304212155 its reverse (551212403032113), we get a palindrome (862442707244268).

The spelling of 311230304212155 in words is "three hundred eleven trillion, two hundred thirty billion, three hundred four million, two hundred twelve thousand, one hundred fifty-five".