312321020 has 24 divisors (see below), whose sum is σ = 715499568. Its totient is φ = 113571200.

The previous prime is 312321017. The next prime is 312321041. The reversal of 312321020 is 20123213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 312320986 and 312321004.

It is a congruent number.

It is an unprimeable number.

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, 709601 + ... + 710040.

It is an arithmetic number, because the mean of its divisors is an integer number (29812482).

Almost surely, 2^312321020 is an apocalyptic number.

It is an amenable number.

312321020 is an abundant number, since it is smaller than the sum of its proper divisors (403178548).

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

312321020 is a wasteful number, since it uses less digits than its factorization.

312321020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419661 (or 1419659 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 312321020 is about 17672.6064857451. The cubic root of 312321020 is about 678.4748256835.

Adding to 312321020 its reverse (20123213), we get a palindrome (332444233).

The spelling of 312321020 in words is "three hundred twelve million, three hundred twenty-one thousand, twenty".