312311220330 has 64 divisors (see below), whose sum is σ = 784499447808. Its totient is φ = 79421263680.

The previous prime is 312311220329. The next prime is 312311220337. The reversal of 312311220330 is 33022113213.

It is a junction number, because it is equal to n+sod(n) for n = 312311220297 and 312311220306.

It is not an unprimeable number, because it can be changed into a prime (312311220337) 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 31 ways as a sum of consecutive naturals, for example, 455334 + ... + 912113.

It is an arithmetic number, because the mean of its divisors is an integer number (12257803872).

Almost surely, 2^312311220330 is an apocalyptic number.

312311220330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

312311220330 is an abundant number, since it is smaller than the sum of its proper divisors (472188227478).

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

312311220330 is a wasteful number, since it uses less digits than its factorization.

312311220330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367811.

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

Adding to 312311220330 its reverse (33022113213), we get a palindrome (345333333543).

The spelling of 312311220330 in words is "three hundred twelve billion, three hundred eleven million, two hundred twenty thousand, three hundred thirty".