312040243 has 8 divisors (see below), whose sum is σ = 320253696. Its totient is φ = 303933000.

The previous prime is 312040213. The next prime is 312040247. The reversal of 312040243 is 342040213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 312040243 - 2²¹ = 309943091 is a prime.

It is a super-2 number, since 2×312040243² = 194738226502998098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312040243.

It is not an unprimeable number, because it can be changed into a prime (312040247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20583 + ... + 32368.

It is an arithmetic number, because the mean of its divisors is an integer number (40031712).

Almost surely, 2^312040243 is an apocalyptic number.

312040243 is a deficient number, since it is larger than the sum of its proper divisors (8213453).

312040243 is an equidigital number, since it uses as much as digits as its factorization.

312040243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53105.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 312040243 is about 17664.6608515420. The cubic root of 312040243 is about 678.2714481445.

Adding to 312040243 its reverse (342040213), we get a palindrome (654080456).

The spelling of 312040243 in words is "three hundred twelve million, forty thousand, two hundred forty-three".