312543503 has 2 divisors, whose sum is σ = 312543504. Its totient is φ = 312543502.

The previous prime is 312543463. The next prime is 312543523. The reversal of 312543503 is 305345213.

It is a strong prime.

It is an emirp because it is prime and its reverse (305345213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312543503 - 2¹⁴ = 312527119 is a prime.

It is a super-2 number, since 2×312543503² = 195366882535022018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312543523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156271751 + 156271752.

It is an arithmetic number, because the mean of its divisors is an integer number (156271752).

Almost surely, 2^312543503 is an apocalyptic number.

312543503 is a deficient number, since it is larger than the sum of its proper divisors (1).

312543503 is an equidigital number, since it uses as much as digits as its factorization.

312543503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 312543503 is about 17678.8999374961. The cubic root of 312543503 is about 678.6358921035.

Adding to 312543503 its reverse (305345213), we get a palindrome (617888716).

The spelling of 312543503 in words is "three hundred twelve million, five hundred forty-three thousand, five hundred three".