311311321320 has 64 divisors (see below), whose sum is σ = 974539797120. Its totient is φ = 79406945024.

The previous prime is 311311321319. The next prime is 311311321333. The reversal of 311311321320 is 23123113113.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56394219 + ... + 56399738.

It is an arithmetic number, because the mean of its divisors is an integer number (15227184330).

Almost surely, 2^311311321320 is an apocalyptic number.

311311321320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

311311321320 is an abundant number, since it is smaller than the sum of its proper divisors (663228475800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311311321320 is a wasteful number, since it uses less digits than its factorization.

311311321320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112793994 (or 112793990 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 311311321320 its reverse (23123113113), we get a palindrome (334434434433).

The spelling of 311311321320 in words is "three hundred eleven billion, three hundred eleven million, three hundred twenty-one thousand, three hundred twenty".