311302311320 has 128 divisors (see below), whose sum is σ = 940437872640. Its totient is φ = 89565488640.

The previous prime is 311302311301. The next prime is 311302311329. The reversal of 311302311320 is 23113203113.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 311302311292 and 311302311301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311302311329) 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, 3847352 + ... + 3927431.

It is an arithmetic number, because the mean of its divisors is an integer number (7347170880).

Almost surely, 2^311302311320 is an apocalyptic number.

It is an amenable number.

311302311320 is an abundant number, since it is smaller than the sum of its proper divisors (629135561320).

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

311302311320 is a wasteful number, since it uses less digits than its factorization.

311302311320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7774825 (or 7774821 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 311302311320 its reverse (23113203113), we get a palindrome (334415514433).

The spelling of 311302311320 in words is "three hundred eleven billion, three hundred two million, three hundred eleven thousand, three hundred twenty".