312135143 has 2 divisors, whose sum is σ = 312135144. Its totient is φ = 312135142.

The previous prime is 312135121. The next prime is 312135163. The reversal of 312135143 is 341531213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312135143 - 2⁸ = 312134887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312135163) 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 as a sum of consecutive naturals, namely, 156067571 + 156067572.

It is an arithmetic number, because the mean of its divisors is an integer number (156067572).

Almost surely, 2^312135143 is an apocalyptic number.

312135143 is a deficient number, since it is larger than the sum of its proper divisors (1).

312135143 is an equidigital number, since it uses as much as digits as its factorization.

312135143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 23.

The square root of 312135143 is about 17667.3468013734. The cubic root of 312135143 is about 678.3402014945.

Adding to 312135143 its reverse (341531213), we get a palindrome (653666356).

The spelling of 312135143 in words is "three hundred twelve million, one hundred thirty-five thousand, one hundred forty-three".