312003143 has 2 divisors, whose sum is σ = 312003144. Its totient is φ = 312003142.

The previous prime is 312003079. The next prime is 312003157. The reversal of 312003143 is 341300213.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (341300213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312003143 - 2⁶ = 312003079 is a prime.

It is a super-2 number, since 2×312003143² = 194691922483756898, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312003163) 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 as a sum of consecutive naturals, namely, 156001571 + 156001572.

It is an arithmetic number, because the mean of its divisors is an integer number (156001572).

Almost surely, 2^312003143 is an apocalyptic number.

312003143 is a deficient number, since it is larger than the sum of its proper divisors (1).

312003143 is an equidigital number, since it uses as much as digits as its factorization.

312003143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 312003143 is about 17663.6107010996. The cubic root of 312003143 is about 678.2445660690.

Adding to 312003143 its reverse (341300213), we get a palindrome (653303356).

It can be divided in two parts, 31200 and 3143, that added together give a palindrome (34343).

The spelling of 312003143 in words is "three hundred twelve million, three thousand, one hundred forty-three".