312031033220 has 48 divisors (see below), whose sum is σ = 705569719680. Its totient is φ = 115479473664.

The previous prime is 312031033219. The next prime is 312031033241. The reversal of 312031033220 is 22330130213.

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 = 312031033192 and 312031033201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7757384 + ... + 7797503.

It is an arithmetic number, because the mean of its divisors is an integer number (14699369160).

Almost surely, 2^312031033220 is an apocalyptic number.

It is an amenable number.

312031033220 is an abundant number, since it is smaller than the sum of its proper divisors (393538686460).

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

312031033220 is a wasteful number, since it uses less digits than its factorization.

312031033220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15554972 (or 15554970 counting only the distinct ones).

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

Adding to 312031033220 its reverse (22330130213), we get a palindrome (334361163433).

The spelling of 312031033220 in words is "three hundred twelve billion, thirty-one million, thirty-three thousand, two hundred twenty".