312203031320 has 64 divisors (see below), whose sum is σ = 733826718720. Its totient is φ = 119316613504.

The previous prime is 312203031293. The next prime is 312203031323. The reversal of 312203031320 is 23130302213.

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 = 312203031292 and 312203031301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312203031323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 624749 + ... + 1007331.

It is an arithmetic number, because the mean of its divisors is an integer number (11466042480).

Almost surely, 2^312203031320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312203031320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366913359360).

312203031320 is an abundant number, since it is smaller than the sum of its proper divisors (421623687400).

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

312203031320 is a wasteful number, since it uses less digits than its factorization.

312203031320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383504 (or 383500 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 312203031320 its reverse (23130302213), we get a palindrome (335333333533).

The spelling of 312203031320 in words is "three hundred twelve billion, two hundred three million, thirty-one thousand, three hundred twenty".