143316421 has 2 divisors, whose sum is σ = 143316422. Its totient is φ = 143316420.

The previous prime is 143316413. The next prime is 143316457. The reversal of 143316421 is 124613341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132020100 + 11296321 = 11490^2 + 3361^2 .

It is a cyclic number.

It is not a de Polignac number, because 143316421 - 2³ = 143316413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143316491) 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, 71658210 + 71658211.

It is an arithmetic number, because the mean of its divisors is an integer number (71658211).

Almost surely, 2^143316421 is an apocalyptic number.

It is an amenable number.

143316421 is a deficient number, since it is larger than the sum of its proper divisors (1).

143316421 is an equidigital number, since it uses as much as digits as its factorization.

143316421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 25.

The square root of 143316421 is about 11971.4836590959. The cubic root of 143316421 is about 523.3175723365.

Adding to 143316421 its reverse (124613341), we get a palindrome (267929762).

The spelling of 143316421 in words is "one hundred forty-three million, three hundred sixteen thousand, four hundred twenty-one".