312112543 has 4 divisors (see below), whose sum is σ = 312208768. Its totient is φ = 312016320.

The previous prime is 312112531. The next prime is 312112547. The reversal of 312112543 is 345211213.

It is a happy number.

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 312112543 - 2⁵ = 312112511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312112547) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 43071 + ... + 49792.

It is an arithmetic number, because the mean of its divisors is an integer number (78052192).

Almost surely, 2^312112543 is an apocalyptic number.

312112543 is a deficient number, since it is larger than the sum of its proper divisors (96225).

312112543 is an equidigital number, since it uses as much as digits as its factorization.

312112543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96224.

The product of its digits is 720, while the sum is 22.

The square root of 312112543 is about 17666.7071917774. The cubic root of 312112543 is about 678.3238294637.

Adding to 312112543 its reverse (345211213), we get a palindrome (657323756).

The spelling of 312112543 in words is "three hundred twelve million, one hundred twelve thousand, five hundred forty-three".