143021313 has 12 divisors (see below), whose sum is σ = 207730068. Its totient is φ = 94819680.

The previous prime is 143021297. The next prime is 143021327. The reversal of 143021313 is 313120341.

It can be written as a sum of positive squares in 2 ways, for example, as 34715664 + 108305649 = 5892^2 + 10407^2 .

It is not a de Polignac number, because 143021313 - 2⁴ = 143021297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (143021513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42270 + ... + 45527.

It is an arithmetic number, because the mean of its divisors is an integer number (17310839).

Almost surely, 2^143021313 is an apocalyptic number.

It is an amenable number.

143021313 is a deficient number, since it is larger than the sum of its proper divisors (64708755).

143021313 is a wasteful number, since it uses less digits than its factorization.

143021313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87984 (or 87981 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 143021313 is about 11959.1518511975. The cubic root of 143021313 is about 522.9581314957.

Adding to 143021313 its reverse (313120341), we get a palindrome (456141654).

The spelling of 143021313 in words is "one hundred forty-three million, twenty-one thousand, three hundred thirteen".