312103243 has 4 divisors (see below), whose sum is σ = 312161040. Its totient is φ = 312045448.

The previous prime is 312103241. The next prime is 312103247. The reversal of 312103243 is 342301213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312103243 - 2¹ = 312103241 is a prime.

It is a super-2 number, since 2×312103243² = 194816868582234098, 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 312103243.

It is not an unprimeable number, because it can be changed into a prime (312103241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19855 + ... + 31912.

It is an arithmetic number, because the mean of its divisors is an integer number (78040260).

Almost surely, 2^312103243 is an apocalyptic number.

312103243 is a deficient number, since it is larger than the sum of its proper divisors (57797).

312103243 is an equidigital number, since it uses as much as digits as its factorization.

312103243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57796.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 312103243 is about 17666.4439828733. The cubic root of 312103243 is about 678.3170920710.

Adding to 312103243 its reverse (342301213), we get a palindrome (654404456).

It can be divided in two parts, 31210 and 3243, that added together give a triangular number (34453 = T₂₆₂).

The spelling of 312103243 in words is "three hundred twelve million, one hundred three thousand, two hundred forty-three".