311123204345 has 32 divisors (see below), whose sum is σ = 377288271360. Its totient is φ = 246288003840.

The previous prime is 311123204299. The next prime is 311123204363. The reversal of 311123204345 is 543402321113.

It is not a de Polignac number, because 311123204345 - 2²⁴ = 311106427129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 299444336 + ... + 299445374.

It is an arithmetic number, because the mean of its divisors is an integer number (11790258480).

Almost surely, 2^311123204345 is an apocalyptic number.

It is an amenable number.

311123204345 is a deficient number, since it is larger than the sum of its proper divisors (66165067015).

311123204345 is a wasteful number, since it uses less digits than its factorization.

311123204345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2465.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 311123204345 its reverse (543402321113), we get a palindrome (854525525458).

The spelling of 311123204345 in words is "three hundred eleven billion, one hundred twenty-three million, two hundred four thousand, three hundred forty-five".