312021304 has 16 divisors (see below), whose sum is σ = 668617200. Its totient is φ = 133723392.

The previous prime is 312021301. The next prime is 312021313. The reversal of 312021304 is 403120213.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312021301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2785849 + ... + 2785960.

It is an arithmetic number, because the mean of its divisors is an integer number (41788575).

Almost surely, 2^312021304 is an apocalyptic number.

It is an amenable number.

312021304 is an abundant number, since it is smaller than the sum of its proper divisors (356595896).

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

312021304 is a wasteful number, since it uses less digits than its factorization.

312021304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5571822 (or 5571818 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 312021304 is about 17664.1247731100. The cubic root of 312021304 is about 678.2577255097.

Adding to 312021304 its reverse (403120213), we get a palindrome (715141517).

The spelling of 312021304 in words is "three hundred twelve million, twenty-one thousand, three hundred four".