312231303220 has 24 divisors (see below), whose sum is σ = 664667736264. Its totient is φ = 123181664256.

The previous prime is 312231303191. The next prime is 312231303271. The reversal of 312231303220 is 22303132213.

It can be written as a sum of positive squares in 4 ways, for example, as 73925259664 + 238306043556 = 271892^2 + 488166^2 .

It is a junction number, because it is equal to n+sod(n) for n = 312231303191 and 312231303200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106927069 + ... + 106929988.

It is an arithmetic number, because the mean of its divisors is an integer number (27694489011).

Almost surely, 2^312231303220 is an apocalyptic number.

It is an amenable number.

312231303220 is an abundant number, since it is smaller than the sum of its proper divisors (352436433044).

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

312231303220 is a wasteful number, since it uses less digits than its factorization.

312231303220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213857139 (or 213857137 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 312231303220 its reverse (22303132213), we get a palindrome (334534435433).

The spelling of 312231303220 in words is "three hundred twelve billion, two hundred thirty-one million, three hundred three thousand, two hundred twenty".