312043520 has 96 divisors (see below), whose sum is σ = 773660160. Its totient is φ = 120668160.

The previous prime is 312043519. The next prime is 312043541. The reversal of 312043520 is 25340213.

It is a happy number.

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 = 312043492 and 312043501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316949 + ... + 317931.

It is an arithmetic number, because the mean of its divisors is an integer number (8058960).

Almost surely, 2^312043520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312043520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (386830080).

312043520 is an abundant number, since it is smaller than the sum of its proper divisors (461616640).

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

312043520 is an equidigital number, since it uses as much as digits as its factorization.

312043520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041 (or 1021 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 312043520 is about 17664.7536071127. The cubic root of 312043520 is about 678.2738225046.

Adding to 312043520 its reverse (25340213), we get a palindrome (337383733).

The spelling of 312043520 in words is "three hundred twelve million, forty-three thousand, five hundred twenty".