311312203320 has 64 divisors (see below), whose sum is σ = 947090672640. Its totient is φ = 81847337600.

The previous prime is 311312203289. The next prime is 311312203339. The reversal of 311312203320 is 23302213113.

It is a congruent number.

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, 18260976 + ... + 18278015.

It is an arithmetic number, because the mean of its divisors is an integer number (14798291760).

Almost surely, 2^311312203320 is an apocalyptic number.

311312203320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

311312203320 is an abundant number, since it is smaller than the sum of its proper divisors (635778469320).

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

311312203320 is a wasteful number, since it uses less digits than its factorization.

311312203320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36539076 (or 36539072 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 311312203320 its reverse (23302213113), we get a palindrome (334614416433).

The spelling of 311312203320 in words is "three hundred eleven billion, three hundred twelve million, two hundred three thousand, three hundred twenty".