312220022320 has 40 divisors (see below), whose sum is σ = 725956656336. Its totient is φ = 124880249088.

The previous prime is 312220022287. The next prime is 312220022321. The reversal of 312220022320 is 23220022213.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (312220022321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1274059 + ... + 1499221.

Almost surely, 2^312220022320 is an apocalyptic number.

It is an amenable number.

312220022320 is an abundant number, since it is smaller than the sum of its proper divisors (413736634016).

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

312220022320 is a wasteful number, since it uses less digits than its factorization.

312220022320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242509 (or 242503 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 312220022320 its reverse (23220022213), we get a palindrome (335440044533).

The spelling of 312220022320 in words is "three hundred twelve billion, two hundred twenty million, twenty-two thousand, three hundred twenty".