312320543 has 2 divisors, whose sum is σ = 312320544. Its totient is φ = 312320542.

The previous prime is 312320531. The next prime is 312320557. The reversal of 312320543 is 345023213.

It is a weak prime.

It is an emirp because it is prime and its reverse (345023213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312320543 - 2⁴ = 312320527 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312340543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156160271 + 156160272.

It is an arithmetic number, because the mean of its divisors is an integer number (156160272).

Almost surely, 2^312320543 is an apocalyptic number.

312320543 is a deficient number, since it is larger than the sum of its proper divisors (1).

312320543 is an equidigital number, since it uses as much as digits as its factorization.

312320543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 312320543 is about 17672.5929902773. The cubic root of 312320543 is about 678.4744802775.

Adding to 312320543 its reverse (345023213), we get a palindrome (657343756).

The spelling of 312320543 in words is "three hundred twelve million, three hundred twenty thousand, five hundred forty-three".